该是母鸡孵蛋的时候了.It is time for hens to brood.是母鸡孵蛋的时候了.It's a time for hens to brood.这化石显示,早在鸟类出现之前,孵蛋的行为就已经演化出来.The fossil demonstrates that brooding behavior evolved long before there were birds....
如果使用得当，避孕套是很有效的避孕手段。Condoms are an effective method of birth control if used with care.虽然多数避孕套含有杀精剂，但也有一些是不含的。Although most condoms contain spermicide, there are some manufactured without.想到老师将分发避孕套给学生使一些家长愤慨不已。The prosp...
我们的整个节目都是关注心灵的，但却不是宗教性的。Our whole programme is spiritually oriented but not religious.对他狭隘扭曲的心灵来说，他的行为当然是可以原谅的。His actions, to his small perverted mind, were surely forgivable.当一些事情的发生动摇这些信念时，恐惧就会占据我们的心灵。When events happ...
The gift was disassembled and shipped to its new land.这件礼物被折成几部分,装上船运往它的新址.Transmission equipment is simple and durable, easily disassembled and adjusted.传输设备很简单,而且经久耐用, 易于拆解和调整.Reassemble the relief valve in the reverse...
对于α-氨基仍采用Fmoc保护策略, 侧链氨基用二碳酸二叔丁酯引入叔丁氧羰基来保护,侧链胍基用酸敏感保护基2,2, 4,6,7-五甲基二氢苯并呋喃-5-磺酰基来保护.Fmoc, Boc and Pbf were used respectively to protect α - amido, side amido and side guanidine group....
力学和电磁学的这种相互关系不太明显.This interplay between mechanics and electromagnetism is less evident.我们要在电磁学中检验同样的想法.We are naturally drawn to try out the same ideas on electromagnetism.经典力学和经典电磁学不足以解释电子在原子内的运动.Classical mechanics an...
Nested classes can lead to more readable and maintainable code.内嵌类可以使得代码更易读和易维护.The database will to be easily maintainable and extensible.该数据库将需要易于维护和扩展.The house is so run down that it is hardly maintainable.这房子太破旧了,几乎...