所有老朋友都前来参加了这次活动。

All the old crowd have come out for this occasion.

《柯林斯英汉双解大词典》

有些家长认为，孩子必须参加所有能参加的活动。

Some parents believe that their kids must be involved in every possible activity out there.

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有足够的时间参加学校的所有活动。

I had enough time to attend all school activities.

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如果你参加一个之前没有见过在场所有人的聚会活动或者是某项课程，今天你可能会有机会。

You may have this opportunity if you attend a gathering or function, or perhaps a course of some kind where you have not previously met everyone present.

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参加所有需要的活动。

Attend various functions as when required.

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感谢参加本次活动所有参与者！

Thank all the participants of this activity!

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所有的中国代理公司都参加了这项有关新业务的报告活动。

All China media agencies participate in this new business reporting.

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所有的中国代理公司都参加了这项有关新业务的报告活动。

All China media agencies participate in this new business reporting.

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