She tried not to let slip what she knew.

她尽量不把她所知道的事泄露出去。

《牛津词典》

I bet he let slip that I'd gone to America.

我确信他无意中说出了我已去了美国。

《柯林斯英汉双解大词典》

Don't let slip such a golden opportunity.

机会难得，幸勿失之交臂。

《新英汉大辞典》

He also let slip that another historic character will be making an appearance in the game.

CNN: 'Mario,' 'Zelda' creator says give the Wii U time

Aston Villa let slip a two-goal lead to draw 2-2 at West Bromwich Albion.

CNN: Silva brace keeps Man City in title hunt

Two of those are the price and the packaging, which online retailer Newegg has just let slip.

ENGADGET: Windows 8 packaging and pricing revealed: standard OEM $99, Pro Pack $139, pre-order from today