Crystals may be insulators, semiconductors, or conductors.晶体可以是绝缘体, 半导体, 或导体.Semiconductors containing such impurities are called p - type semiconductors.含有这类杂质的半导体叫做P型半导体.It is not possible to name any particular conduc...
Semiconductors containing such impurities are called p - type semiconductors.含有这类杂质的半导体叫做P型半导体.It is not possible to name any particular conductivity at which metals end and semiconductors begin.不可能说出在哪个特定的导电系数处是金属和半导体的分...
As I was looking through some books on a secondhand bookstall,I dropped on just what I wanted.当我在旧书摊浏览书籍时,我意外地找到了我所需要的书。She will never come into the bookstall again.她不会再来这个报摊了.Perhaps you might chance upon the dictionary...
...roomy jackets.宽松的夹克a roomy apartment宽大的房间...accommodation which is roomy and offers more than generous stowage.住宿宽敞，储藏空间绰绰有余The car is roomy and a good choice for anyone who needs to carry equipment.这种车非常宽敞，对于需要携带装备的人...