绝缘体的原子把电子抓得很牢.The atoms of an insulator hold their electrons very tight.晶体可以是绝缘体, 半导体, 或导体.Crystals may be insulators, semiconductors, or conductors.由绝缘体隔开任何两个导体就组成电容器.Any two conductors separated by an insulator are sai...
It vexed me to think of others gossiping behind my back.一想到别人在背后说我闲话，我就很恼火。She can spend a whole day gossiping with her neighbours.她能一整天都跟邻居们说长道短.Her continual gossiping chased her friends away.她没完没了的闲话把朋友们都赶走了....
I have had nephritis, but that was five years ago.我有过肾炎，但那是五年前的事了。Background : Henoch - Schonlein purpura nephritis ( HSPN ) is a common secondary glomerulonephritis in children.过敏性紫癜性肾炎 ( HSPN ),是儿童时期常见的继发性肾脏疾病.The neph...