The first recorded use of OK was in the spring of 1839by the Boston Morning post.

OK有记录的用法首次出现在1839年春季的波士顿晨报上，现摘录如下。

youdao

The FBI seized on the fact that on five days when Hanjour trained on an AST simulator like this, Raissi too recorded use of the machine.

BBC: Lotfi Raissi transcript

Labour leader Ed Miliband, whose phrase "squeezed middle" - referring to those hit hardest by falling living standards - was word of the year in 2011, made the first recorded use of omnishambles in the House of Commons in April.

BBC: UK Politics

"In Scotland a completely silent call is generated from the alarm and the operator does not speak, they listen in to what is happening in the house and the call is recorded for use as evidence, " said a spokeswoman.

BBC: Caution over domestic abuse alarm