Malicacid
[化]苹果酸, 羟基丁二酸
🗣️ 情景例句
and he made the weekend very easy for us to enjoy.
使得我们的周末过得非常轻松愉快。
No man can do two things at once.
心无二用。
Mary is still writing letters. She's been writing letters all day.
马力还在写信，她写了一整天的信。