internal volume短语⁵⁸⁷⁴⁷ 基本例句 内体积 A high quality flashlight having a closed internal/span> volume includes a one-way valve associated with a passage extending to atmosphere from the closed internal volume. 优质的闪光灯有密闭的内体积，内含一个单向的阀门，阀门中有通道伸入空中。 bbs.translators.com.cn