Propanal
丙醛
🗣️ 情景例句
And what does your father do?
令尊是做什么的？
Will you stay there for long?
你会在那儿待很长时间吗？
but children were then too cowed to let them know how they really felt.
孩子们只不过被吓得不敢让父母知道自己的想法罢了。