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Note that the handler function must have the signature defined by the delegate.
注意该处理器函数必须具备由委托定义的签名。
youdao
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To use Delegate, you need to attach some function to it.
要使用委派，你需要一些附加功能，给它。
youdao
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To use Delegate, you need to attach some function to it.
要使用委派，你需要一些附加功能，给它。
youdao