adj.外殼的
n.外殼
A microphone inside each muff senses sound waves that make it through the outer ear cup, and a speaker creates pressure waves that cancel them. 耳機(jī)罩內(nèi)的麥克風(fēng)負(fù)責(zé)感應(yīng)傳入耳機(jī)外殼的聲波,喇叭負(fù)責(zé)制造壓力波予以抵消。
用作名詞 (n.)The turtle has a very hard shell. 烏龜有很堅(jiān)硬的外殼。
Its thin outer shell had protected its liquid interior. 它薄薄的外殼保護(hù)著它呈液體的內(nèi)臟。