为什么尺子零刻度前有空隙
字幕摘录
| 时间 | 英文 | 中文 |
|---|---|---|
| 0:00 | I bet you saw some kind of the ruler many many times, but have you ever | 我敢打赌,你见过 某种统治者 很多次,但你曾经 |
| 0:04 | wondered why there is a gap between the end of the ruler and the zero? | 想知道为什么统治者的末端和零之间有差距吗? |
| 0:10 | And the | 还有 |
| 0:11 | reason is actually quite simple and very practical. | 事实上,理性是相当简单和非常实际的。 |
| 0:15 | Those rulers are living a | 这些统治者正在生活 |
| 0:17 | rough life. | 艰难的生活。 |
| 0:17 | They get a lot of dents, bends and scratches. | 它们有很多凹陷,弯曲和刮伤. |
| 0:21 | And if it would start from | 如果从头开始 |
| 0:24 | exactly zero, every scratch or damage to the end of the ruler would just | 完全零,每刮伤或损坏 统治者的末端 |
| 0:32 | basically destroy its accuracy. | 基本上破坏了它的准确性. |
展开字幕全文（87 条）
| 序号 | 英文 | 中文 |
|---|---|---|
| 1 | I bet you saw some kind of the ruler many many times, but have you ever | 我敢打赌,你见过 某种统治者 很多次,但你曾经 |
| 2 | wondered why there is a gap between the end of the ruler and the zero? | 想知道为什么统治者的末端和零之间有差距吗? |
| 3 | And the | 还有 |
| 4 | reason is actually quite simple and very practical. | 事实上,理性是相当简单和非常实际的。 |
| 5 | Those rulers are living a | 这些统治者正在生活 |
| 6 | rough life. | 艰难的生活。 |
| 7 | They get a lot of dents, bends and scratches. | 它们有很多凹陷,弯曲和刮伤. |
| 8 | And if it would start from | 如果从头开始 |
| 9 | exactly zero, every scratch or damage to the end of the ruler would just | 完全零,每刮伤或损坏 统治者的末端 |
| 10 | basically destroy its accuracy. | 基本上破坏了它的准确性. |
| 11 | It wouldn't measure accurately. | 它不会准确测量。 |
| 12 | So those | 所以这些 |
| 13 | extra few millimeters make sure that it won't lose accuracy over time when it | 额外增加的几毫米确保不会在一段时间内失去准确性 |
| 14 | gets any damages. | 得到任何损失。 |
| 15 | And another thing is the cost. | 还有一件事是代价 |
| 16 | And I see how you are thinking | 我了解你的想法,我明白你的想法,我明白你的想法 |
| 17 | how those extra few millimeters can decrease the cost of the ruler. | 这些额外的几毫米可以降低尺子的成本. |
| 18 | But it | 不过 |
| 19 | actually does. | 事实上是的。 |
| 20 | In manufacturing process, when the rulers are made, those | 在制造过程中,当统治者被制造时, |
| 21 | measurements are printed on a huge piece of material, whether it's wood, plastic or | 测量结果被打印在一块巨大的材料上,无论是木材,塑料还是 |
| 22 | whatever. | 随便吧 |
| 23 | And then they are cutted in the shape of the ruler basically. | 然后它们基本上被切割成尺子的形状. |
| 24 | And when we | 当我们 |
| 25 | have those extra, this extra gap, we don't need very accurate cutting. | 有这些额外的,这个额外的缺口, 我们不需要非常精确的剪切。 |
| 26 | We just cut | 我们只是切 |
| 27 | between those measurements and we are good. | 这些测量值之间,我们是好的。 |
| 28 | But if we would need to cut at the | 但是如果我们需要削减 |
| 29 | exact zero, any microscopic inaccuracy would make the ruler inaccurate | 完全零,任何微小的不准确 都会使尺子不准确 |
| 30 | basically. | 基本上说 |
| 31 | And it would be practically useless. | 而且这几乎是没用的。 |
| 32 | Accuracy, you know, it costs. | 准确性,你知道,它的成本。 |
| 33 | But | 不过 |
| 34 | for actually rulers which starts from zero. | 对从零开始的实际统治者。 |
| 35 | And they are used in specific | 它们被具体使用 |
| 36 | reasons. | 理由说明。 |
| 37 | Usually they are used to measure corners or kind of holes which | 通常用来测量角落或洞穴 |
| 38 | can be done with those rulers. | 可以和这些统治者打交道。 |
| 39 | But those rulers are made from, usually made from | 但是,这些统治者 由,通常由 |
| 40 | hardened steel and they don't wear out that quickly like plastic or wood. | 硬化的钢,它们不会像塑料或木材那样迅速磨损。 |
| 41 | And | 还有 |
| 42 | since we are speaking about the rulers, it's worth to mention the measuring tape. | 既然我们谈论的是统治者 值得一提的是测量磁带 |
| 43 | And this measuring tape actually has a few genius engineering tricks which not | 而这个测量磁带实际上有一些天才 工程技巧,没有 |
| 44 | many people knows about that. | 很多人都知道这一点。 |
| 45 | So first of all you see that metal hook at the end | 所以,首先,你看到金属钩 在结尾 |
| 46 | and it is moving a little bit. | 它移动了一点点。 |
| 47 | And it's not a manufacturing flaw, it is actually | 这不是制造缺陷,其实是 |
| 48 | a feature of this measuring tape. | 这个测量磁带的一个特征。 |
| 49 | So let's say for example you want to | 比如说你想 |
| 50 | measure something like a corner of the distance from the wall. | 测量距离墙的角落 |
| 51 | And you press it | 你按着它 |
| 52 | to the wall and this thing moves into that direction. | 到墙上,这个东西移动到那个方向。 |
| 53 | And you can just measure | 你只能测量 |
| 54 | this thing from the wall. | 这个东西从墙上。 |
| 55 | Another use case, you want to measure | 另一个用例,你想测量 |
| 56 | something and hook this to something and measure like that. | 把它钩在一样的东西上 测量一下 |
| 57 | And when you do that | 当你这样做 |
| 58 | this moves slightly into that direction. | 这稍稍向那个方向移动。 |
| 59 | And in both cases it is measuring | 在这两种情况下,它都是测量的 |
| 60 | accurately. | 没错 |
| 61 | So that's kind of simple but genius at the same time, right? | 所以,这是一种简单但天才 同时,对不对? |
| 62 | But there's | 但还有 |
| 63 | one more trick which I don't think that many people knows. | 还有一招,我想很多人不知道 |
| 64 | And you can see there | 你可以看到这里 |
| 65 | is a tiny hole in that measuring tape. | 是一个小洞 在测量磁带。 |
| 66 | It doesn't look like a feature or anything | 它看起来不像是特色什么的 |
| 67 | but it is actually very useful. | 但它实际上非常有用。 |
| 68 | Let's say you are a handyman and you are working a | 假设你是帮手,你正在工作 |
| 69 | loan and you need to measure long distances. | 需要测量长距离。 |
| 70 | And if you hook that to | 如果你把它钩上 |
| 71 | something it might fall and especially with long distances it's very | 可能掉下来的东西 特别是长途跋涉 |
| 72 | difficult. | 很难 |
| 73 | But there is this hole which you can nail to the wood | 但有一个洞 你可以钉在木上 |
| 74 | or something. | 或东西。 |
| 75 | You can just attach it from where you want to measure. | 你可以从你想测量的地方把它附着起来。 |
| 76 | Maybe this | 也许这个 |
| 77 | hole and it stays at that place as long as you need. | 只要有需要,它就留在那个地方 |
| 78 | So that's a very practical | 所以这是非常实际的 |
| 79 | thing which might be useful for you. | 对你有用的东西。 |
| 80 | And speaking about things that you probably | 谈论你可能的事 |
| 81 | see every day but never thought about that. | 每天都看到,但从来没有想过。 |
| 82 | Have you ever saw this plastic | 你见过这个塑料吗? |
| 83 | cylinder thing at the end of the charging cables? | 充电电缆末端的圆柱形东西? |
| 84 | They are here for a | 他们来这里是为了一个 |
| 85 | reason. | 理由,我说, |
| 86 | And I have a video about that. | 我有一个视频。 |
| 87 | So see you there. | 在那里见 |
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