✅ 同义词
🗣️ 情景例句
I don't know what I would do without you.
我真不知道没有你们我怎么办。
He has forgotten about his job.
他把工作忘得一干二净。
and we know something of the great variety of the sea bed's topography.
而且我们对海底地形的千变万化也有了一定的了解。