Potamobenthos
河流的底栖有机体
🗣️ 情景例句
autograph copies for the guests at the opening?
在展览开幕时为客人在书上亲笔签名呢
Don't they believe it's necessary?
他们难道不认为它是必要的吗？
They were still neck and neck! But the other runners were not far behind.
他们仍在肩并肩地跑！但是，其他运动员也距离他们不远。