If you regard someone or something as expendable, you think it is acceptable to get rid of them, abandon them, or allow them to be destroyed when they are no longer needed.
例句
Once our services cease to be useful to them, we're expendable...一旦我們的服務對他們不再有用，我們就可能被拋棄。During the recession, training budgets were seen as an expendable luxury.在經濟衰退期間，培訓預算被認為是一項可以節(jié)省下來的奢侈費用。