Q.s.
[医] 适量, 足量
🗣️ 情景例句
Good morning, Ellen.
早安， Ellen。
Just to be on the safe side.
为了安全起见。
Though a number of descents have been made, much of it still remains to be explored.
人们多次进入洞内探险，但至今尚有不少东西有待勘探。