The craze for roller skating spread throughout the U.S.滑旱冰在全美风靡一时。The U.S. trade deficit hit a record $ 152 thousand - million that same year.1987年美国的贸易逆差创历史最高纪录,达到1520亿美元.There are extensive coal deposits in the U.S.S.R...
只有4种: 腺嘌呤 、 胸腺嘧啶 、 鸟嘌呤和胞核嘧啶.There are just four kinds: adenine, thymine, guanine and cytosine.腺嘌呤:在DNA和RNA中发现的含氮的碱基 ( 6 - 氨基嘌呤 ).Adenine A nitrogenous base ( 6 - amino - purine ) found in DNA and RNA.尿嘧啶 -- 核糖核酸中的一种嘧啶,与腺...
Hotels operate a collection service for their guests from the airports.宾馆为客人提供机场接机服务。You can fly direct to Amsterdam from most British airports.从英国的大多数机场都可以直飞阿姆斯特丹。The hotel's wedged right between the two airports.那...