我向下滚动文档搜索“美利坚合众国”。I scrolled down to find "United States of America".美利坚合众国the United States of America美利坚合众国常被缩略为U. S. A..The United States of America is commonly abbreviated to U.S.A.....
There are also many elves.还有这么多小精灵.You know how all elves are forced to sing and dance?知道精灵们是怎样被逼迫的又唱又跳?You think Santa makes them his little elves?你以为是圣诞老人把他们变成他的小精灵 吗 ?...
The first catalytic converters were called conventional oxidation catalysts.最初的转化器叫做常规氧化催化器.Many processes that are essential to the chemical industry use heterogeneous catalysts.很多重要的化学工业过程就是使用多相催化剂的.Catalysts that lowe...