expendable
/ɪkˈspendəbl/adjective
1- (of an object) designed to be used only once and then abandoned or destroyed（实物）只用一次的, 一次性的：
the need for unmanned and expendable launch vehicles.
对不载人、使用一次即毁弃的运载工具的需求。
1.1
- of little significance when compared to an overall purpose, and therefore able to be abandoned or allowed to be killed or destroyed（对全局来说）无足轻重的; 可以放弃（或牺牲、摧毁）的：
the region is expendable in the wider context of national politics.
从更大范围的国家政治面来看, 该地区是无足轻重的。
派生词