如何用全站仪放样右手坐标系中的点位？这虽是一个很少遇到但仍有可能发生的问题。

How to set out a point in the right-hand coordinate system with the Total Station? This is a problem that might arise, although rarely encountered.

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鸟媒系在长绳上的一束羽毛，在放鹰狩猎中用来召回猎鹰。

A bunch of feathers attached to a long cord, used in falconry to recall the hawk.

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通过在储氢合金中掺适量的钴系添加剂，可显著提高电池的耐过放能力、合金粉的循环寿命及电极容量。

The over-discharge resist ability of batteries, the cycle life of alloys and the capacity of electrodes can be distinctly improved by mixing appropriate amount of Co additives with alloys.

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So a closed system would be, for instance, a glass of ice water with an ice cube in it, with the lid on top.

因此闭系可以是，比如说，一杯放了,一个冰块的冰水，顶上加了盖子。

麻省理工公开课 - 热力学与动力学课程节选

You don't need to know those, but just because it's a special case with the hydrogen atom, they do tend to be named -- the most important, of course, tends to be the Balmer series because that's what we can actually see being emitted from the hydrogen atom.

你们不需要记住,但因为这是氢原子的特例,人们想要命名它，最重要的是当然是Balmer系,因为它是我们可以看到的,从氢原子放出来的光谱。

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