🧩 词语组成解析
ethical
['eθikəl]
adj. 伦理学的;道德的，伦理的;凭处方出售的;
n. 凭医师处方出售的药品;
🗣️ 情景例句
Do you need-that-pencil?
你要那只铅笔吗？
To enter outer space
飞出大气层，进入外太空
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。