英语词汇“optional”的翻译、意思、用法、释义-英汉双解词典-注文网

单词	optional
释义	optional ['ɒpʃәnl] -1 a. 可选择的, 随意的 [化] 选购的 (高研四六托雅宝 5692/5815)\n
随便看	backing condenser backing copy backing cough backing deal backing deals backing device backing diaphragm backing distance backing dog backing down backing eccentric rod backing fabric backing field backing film backing frame backing gas backing groove backing groove of weld backing light backing line backing log backing maneuvers backing material backing memory backing movement 身经百战，勇冠三军身经百战，叱咤风云身者所为也，天下者所以为也身者，事之规矩也。未闻枉己而能正人者身莫不恶死，而未尝有不死；国莫不恶亡，而未尝有不亡身虽否而道之亨也。身行万里半天下，僧卧一庵初白头。身要严重，意要安定，色要温雅，气要和平，语要简切，心要慈祥，志要果毅，机要缜密。身贤者贤也，能进贤者亦贤也身贤者，贤也；能进贤者，亦贤也。ショウタンショウダイショウダクショウダンショウダンショウチショウチショウチショウチショウチクバイ