Letovicite
[矿]酸性铵矾
🗣️ 情景例句
I'm not sure I'm up to it.
我不能肯定我是否能做得来。
They have been much too irresponsible for their high position.
他们虽身居要位，未免太缺乏责任感了。
Hi! I'm sorry I was out when you rang.
你好！我很抱歉，你打电话时我出去了。