英语词汇“optional”的读音、翻译、释义、用法及例句-开邑网

词汇	optional
释义	optionaloptionalD.J.:[ˈɔpʃənl]K.K.:[ˈɑpʃənəl]adj.1.■可选择的, 非强制的The goods are optional, but only one.这些物品是可以任选的, 但只能选一个。
随便看	crossed contamination crossed control crossed core type crossed-core type transformer crossed crank mechanism crossed cylinder lens crossed cylinders cross eddy crossed ectopic kidney crossed electric and magnetic field crossed electron beams crossed extensor reflex crossed field crossed-field amplifier crossed field amplifier crossed field device crossed-field device crossed field gauge crossed-field spectrometer crossed field tube crossed flexor reflex cross edge crossed grating crossed grating interferometer crossed grating spectrograph

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