The current hook procedure must also return this value.
当前钩子子程也必须返回该值。
It also answers your first point, that the constructor must have a return type.
这也回答了你的第一点，这个构造函数必须有返回类型。
We enjoy the environment, it must also contribute their efforts, as a return to society.
我们在享受这份环境的同时，更要贡献自己的力量，作为对社会的回报。
We enjoy the environment, it must also contribute their efforts, as a return to society.
我们在享受这份环境的同时，更要贡献自己的力量，作为对社会的回报。
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