The school labours under the disadvantage of not having enough textbooks.这所学校苦于课本不足的不利条件.The library didn’t stock zoology textbooks.这家图书馆没有动物学教科书。English textbooks and dictionaries are on sale everywhere.英语教材和词典到处都有卖的。En...
Engineers said that plutonium could begin seeping from the corroded sub.工程师说钚可能会开始从遭腐蚀的潜艇往外渗透。Dangerous emissions radiate from plutonium.危险的辐射物从钚放散出来.The plutonium also could be used, however, to make nuclear weapons.钚也可...