5个able为后缀的单词

　　例句：

　　This is a well researched and very readable book.

　　这是一本研究深刻、可读性强的书。

　　The book is clear, readable, and adequately illustrated.

　　这本书易懂易读，而且图解充足。

　　The bags have adjustable shoulder straps.

　　这些包有可调肩带。

　　The height of the bicycle seat is adjustable.

　　这辆自行车车座的高度可以调节。

　　Adjustable wrench for turning off gas and water.

　　可调扳手用于关闭煤气和自来水。