Fat is an excellent insulator against the cold.脂肪是极好的抵御寒冷的绝热体。Dry air is a good insulator, but sea water is not.干燥空气是一种好绝缘物, 海水则不是.The atoms of an insulator hold their electrons very tight.绝缘体的原子把电子抓得很牢....
Fat is an excellent insulator against the cold.脂肪是极好的抵御寒冷的绝热体。Any two conductors separated by an insulator are said to form a capacitor.由绝缘体隔开任何两个导体就组成电容器.The FRP is an insulator to electricity, so it is good in safety.因...
She is wearing tight, black leggings and a baggy green jersey.她身穿黑色紧身裤和一件宽松的绿色针织套衫。a pair of leggings一条女式紧身裤The shirt's ideal worn loose over leggings or tuck it in for a streamlined silhouette.这件衬衫最好是松松垮垮地穿在紧身裤外面，或...
I will give you a videophone ring tonight.今天晚上我给你打可视电话.The videophone is a telephone equipped for both audio and video transmission.电视电话是指既可以看也可以听的电话.People will be able to use videophone for conferences.人们将会使用电视电话来举行会议....
Frost had displayed his usual matey charm as the pair sipped orange juice on national TV.两个人在国家电视台节目上小口喝着橙汁的时候，弗罗斯特施展了他一贯的亲和魅力。I was flicking idly through a newspaper while awaiting the arrival of orange juice and coffee...