adj (fml 文) that may be consumed, destroyed, etc to achieve a purpose 可消费的; 可消耗的; 可毁灭的
*In the Great War soldiers were considered expendable. 在第一次世界大战中, 人们认为士兵是尽可牺牲的.
* In these conservation-conscious times, areas of grassland are no longer expendable. 在人们意识到应当保护自然资源的这个时代, 草原已不容再受破坏了.

adj
not needed enough to be kept or saved
　It's a sad moment when a man loses his job and discovers that he is expendable.