all bets are off

(informal)the outcome of a situation is unpredictable

(非正式)世事难料

bet the farm

(N. Amer. informal)risk everything that one owns on a bet, investment, or enterprise

(北美，非正式)（在赌博、投资或风险事业上）孤注一掷；破釜沉舟

this isn't a great time to bet the farm on the Internet.

现在不是在因特网上孤注一掷的有利时机。

don't (或 wouldn't) bet on it

(informal)used to express doubt about an assertion or situation

(非正式)这拿不准

he may be a suitable companion—but don't bet on it.

他可能会是个合适的同伴——但这也难说。

want to bet?

(informal)used to express vigorous disagreement with a confident assertion

(非正式)敢打赌吗？（用于表示强烈不同意某种说法）

‘You can't be with me every moment.’ ‘Want to bet?’.

“你不可能时刻都和我在一起。"“打不打赌？"。

you bet

(informal)you may be sure; certainly

(非正式)你放心；当然，一定

‘Would you like this piece of pie?’ ‘You bet!’.

“你想吃这块馅饼吗？"“当然！"。

you bet【非正式用语】

Of course; surely.

当然；的确