Thunderhead
n. 雷雨云砧
🗣️ 情景例句
Sure, I'll let you take my daughter you, but make sure she is back by 10.
可以，你可以带我女儿出去，但你要保证十点前把她带回来。
It is never too old to learn.
为学不怕年高。
Sometimes the secrecy goes to such an extent that the whole nature of the research cannot be mentioned.
有时，保密竟达到了这样的程度，即连研究工作的整个性质都不准提及。