第81期:邮递员 Neither rain nor snow keeps the postman from delivering our let...

第076句:工农业效率 Furthermore, it is obvious that the strength of a country s ...

第071句：玩具娃娃 Children will play with dolls equipped with personality chips...

第066句：行为科学 One difficulty is that almost all of what is called behaviora...

第061句 Furthermore, humans have the ability to modify the environment in ...

第056句 In dealing with a challenge on such a scale, it is no exaggeration...

第051句 They may teach very well and more than earn their salaries, but mo...

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第041句 The government is to ban payments to witnesses by newspapers seeki...