As the boat plodded into British waters and up the English Channel, Customs had their eye on her.那艘船缓慢驶入英国水域，沿英吉利海峡向北时，海关一直密切关注着它。Did you have to pay customs duty on that?你们必须为此给顾客付款 吗 ?...components similar to those sei...
This substance has now been cloned by molecular biologists.该物质现在已被分子生物学家克隆。The two biologists found, to their surprise, that both groups of birds survived equally well.这两位生物学家惊奇地发现，两组鸟都很好地存活了下来。Biologists need to compare...