They all raised the question as if by prior agreement.

他们都不约而同地提出了这个问题。

《新英汉大辞典》

Returns: Unsold stocks returned by a bookseller with the publisher's prior agreement.

退书：书商和出版社预先协议，退回卖不出的书。

youdao

When turning toward the west, they both turned their heads to look left as if by a prior agreement vacantly.

向西拐弯的时候，两人不约而同地向左转头看了看。

youdao

Bacanovic told him that the ImClone sale was pursuant to a prior agreement.

FORBES: Martha Trial: 'Everyone Is Telling The Same Story'

With prior agreement from the club, his boss, the start-up founder, came in the door and was introduced to everyone by the club president.

FORBES: Sparkplug Scutaro: the Velcro Effect of Insults and Praise

As this article notes, after McClendon had to sell 94 percent of his Chesapeake shares because of those margin calls, he no longer held the equity stake that his prior employment agreement required.

FORBES: Chesapeake Energy: CEO McClendon Serves Himself First