单词 无背的 例句 DEFINITIVE EXAMPLES 权威例句〔flip-flop〕A backless, often foam rubber sandal held to the foot at the big toe by means of a thong.扣拇指胶底凉鞋:一种在大脚趾处用一根带子固定在脚上的无背的、通常用泡沫橡胶制成的凉鞋美国传统 英语例句辞典...