r开头f结尾的单词

　　例句：

　　Her offer of help was met with a sharp rebuff.

　　她主动帮忙，却遭到断然拒绝。

　　The island is encircled by a coral reef.

　　这个岛周围都是珊瑚礁。

　　An unspoiled coral reef encloses the bay.

　　未经破坏的珊瑚礁围绕着该海湾。

　　Relief supplies were rushed in.

　　救援物资很快就运来了。