Metazoans
a. 后生动物的；多细胞动物的\\nn. 后生动物；多细胞动物
🗣️ 情景例句
Strike while the iron is hot.
趁热打铁。
A little fire is quickly trodden out.
小洞易补。
Some devices were quite simple.
有些装置非常简单。