Alterne
n. (生态学用语)交替群落
🗣️ 情景例句
What's wrong with wanting to be on the school board?
想进入联合校董会有什么错？
I must apologize for his unusual behavior.
我必须为他怪诞的行为致歉。
There has long been a superstition among mariners that porpoises will save drowning men by pushing them to the surface, or protect them from sharks by surrounding them in defensive formation.
长期以来，海员中流传着一种迷信的说法，认为海豚会把快要淹死的人托到水面，救人性命；或在人们周围列队保护，使他们免遭鲨鱼伤害。