Pregroup
前群; 准群
🗣️ 情景例句
Not at all. It's my pleasure.
不客气。这是我的荣幸。
It's no use pumping a dry well.
徒劳无益。
The body's tissues are self-repairing and self-restoring to a degree, and function best when more or less continuously active.
人体组织在一定程度上有自我修补和自我恢复的能力，有张有弛地连续活动时，其功能最佳。