Fluctuating
v. 波动（fluctuate的ing形式）
✅ 同义词
🔴 反义词
🗣️ 情景例句
Good night.
晚安。
How are you doing these days?
这些日子你怎么样？
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。