1. A short-wave expendable communications buoy can offer a new way for the security of the submarine. 消耗型短波通信浮标能为潜艇隐蔽通信提供一种新的手段。
2. The Chinese people have been reminded by the earthquake that lives are not expendable and that deaths cannot go unmourned. 中国人民已经被地震唤醒，他们记起生命不是可有可无的，死亡不能没有哀悼的离去。
3. The conservation plan should determine which buildings must be preserved, which should be preserved under certain circumstances and which, under quite exceptional circumstances, might be expendable. 保护规划应该决定哪些建筑物必须保存，哪些在一定条件下应该保存以及哪些在极其例外的情况下可以拆毁。
英英解释
adj.
1. suitable to be expended
2. (used of funds) remaining after taxes
