If the participant is not an TSS member, a non-member course fee is required. 参加者若非本会会员，须缴交非会员费用。
Non-members substituting for a member must pay the difference in fees. 非会员顶替会员参加的情况下，须补足差价。
Member and nonmember functions with the same name do not overload one another. 具有同一名字的成员函数和非成员函数不会相互重载。
A friend may be an ordinary, nonmember function, a member function of another previously defined class, or an entire class. 友元可以是普通的非成员函数，或前面定义的其他类的成员函数，或整个类。
