When a user agent can't parse the selector, it must ignore the declaration block as well.

当一个用户代理不能解析某个选择器的时候，它必须忽略整个声明块。

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Any Customs clearing agent and individual engaged in making a declaration to the Customs shall not illegally make Customs declaration on behalf of others or go beyond their approved business scope.

报关企业和报关人员不得非法代理他人报关，或者超出其业务范围进行报关活动。

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