Quartz tube
[机] 石英管
🧩 词语组成解析
quartz
[kwɔrts]
n. [矿]石英;
🗣️ 情景例句
The right magic.
正确的魔法。
He who follows two hares is sure to catch neither.
追逐两只兔，两头都落空。
and we have only to turn to that extraordinary discovery of echo-location in bats to see a case in which the voice plays a strictly utilitarian role.
我们只要看一看蝙蝠回声定位这一极不寻常的发现，就可以探究一下声音在什么情况下有绝对的实用价值。