孩子们在小溪边发现了一只绿色的小青蛙。

The children found a small green ___frog by the stream.

这件中式外套用精美的盘扣代替了普通纽扣。

This traditional Chinese jacket uses delicate ___frogs instead of ordinary buttons.

他不小心用'青蛙'这个词称呼那位法国游客，立刻意识到可能不太礼貌。

He accidentally referred to the French tourist as a '___frog', then quickly realized it might be impolite.