Necton
(=nekton)游泳动物, 自游生物
🗣️ 情景例句
Don't cross that bridge till you come to it.
没到河边，先别操心怎么过桥。
Who do you think you are?
你算哪根葱？
For one thing they keep the water clean.
一来，水下植物可以保持水的清洁。