frog /frɔɡ/ n.［c］蛙：A frog has no tail. 青蛙没有尾巴。 Frog can live both on land and in water. 青蛙既能生活在陆地上也能生活在水中。The frog plopped into the pond.青蛙扑通一声跳进池塘。The frog is a cold-blooded animal.青蛙是冷血动物。