Ossis
骨髓腔
🗣️ 情景例句
so we all got to go home early.
所以我们都非早回家不可。
In prosperity think of adversity.
居安思危。
I've been working so hard recently that I haven't had any time for collecting new stamps.
最近我的学习一直很紧张，没有时间收集新邮票。