The for clause binds the variable $y to each address in turn.
for 子句依次将变量 $y 绑定到每个地址。
If a programmer wishes to address the A has_many B through=> [X, Y, Z] issue, they can specify the desired through association in their model class definition, and DrySQL will honour this.
如果开发者想解决A has_manyBthrough=> [X,Y,Z]的问题，他们可以在模型类中定义想要的间接关联，并且DrySQL也希望你这么做。
Switch A does not have the MAC address of Router Y and will therefore flood the frame out its ports.
交换器A因为没有路由器Y的MAC位址，所以会将这个讯框从所有的埠泛流出去。
Professor y. k. cheung, special advisor to the vice - chancellor, will address the assembly.
校长特别顾问张佑启教授将于典礼上致词。
Professor y. k. cheung, special advisor to the vice - chancellor, will address the assembly.
校长特别顾问张佑启教授将于典礼上致词。
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