Primary and secondary schools across multiple Chinese cities have extended class breaks from 10 to 15 minutes from the start of the fall semester in an effort to encourage outdoor activities among ...

append()添加的时候会把添加的数据当成一个整体进行添加，允许添加任意类型的数据 extend()添加的时候会把添加的数据迭代进行添加，只允许添加可迭代对象数据（可迭代对象： 能用for循环进行迭代的对象就是可迭代对象， 比如：字符串，列表，元祖，字典 ...

世界日益连成一个整体，但不同国家间的日常生活习惯却有很大的不同。来自美国的Cheyanne Lovellette总结了中美文化的9个生活差异。 While the modern world has become increasingly connected, the lives of individuals from different cultures still vary widely on ...