You take a material like silver and put it in a glass case and that's the definition of a meter.

你拿某种材料,比如银,把它放进玻璃柜里,那是一米的定义

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I cut it in half, I'll use some protractors and dividers and compasses, you can split the meter into any fraction you like.

把它切成两半,我用量角器,两脚规,还有圆规,你想把一米分成任意份数

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Just like one second is some convention we use and one meter is some convention we use.

就像一秒是我们预先约定的,一米也是我们预先约定的

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I take the meter and put it next to the meter, that's two meters.

我们给一米接上一米,那就是两米了

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Can you tell me, how do you know how long a meter is?

你能告诉我,你怎么知道一米有多长吗

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Napoleon or somebody said, "The size of my ego is one meter."

拿破仑或是谁说,"我的身高就是一米"

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A meter, for example, is not deduced from anything.

一米,打个比方,并不是推导得来的

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How do we decide how long a meter is?

我们是如何决定一米有多长的

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