When someone lies and looks for you to buy into the information they usually want you to agree on the spot.

当一个人欺骗你并且期望你购买提供的信息的时候，他们通常希望你当场同意。

youdao

They decided on the spot to agree, surprising and disarming Gregg, and infuriating some Republican staffers who saw the move coming even before Dodd and Garner made the call.

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For the most part I agree with your analysis which is on spot.

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