Washed coal
[化] 洗煤
🧩 词语组成解析
a. 洗过的
coal
[kol]
n. 煤;煤块;煤堆;木炭;
vi. 上煤;加煤;
vt. 给…加煤;把…烧成炭;
🗣️ 情景例句
Please give me a wake up call at 7:30 am tomorrow.
请在明早七点半叫醒我。
I ought to not bother him any more.
我应该不要打扰他了。
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。