Sooting
v. 煤烟, 烟灰( soot的现在分词 )
🗣️ 情景例句
Thanks for the invitation. And please give my regards to your wife.
谢谢你的邀请。请代我问候贵夫人。
I won't check this baggage
这件行李我不托运。
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。