bargain on

基本解释

Seeing students' book bargain on a campus sidewalk is nothing new, it's true.
學生們在校內的人行道上買賣舊書，這已不是什麽新鮮事兒了。
The biggest obstacles to any grand bargain on Iraq may well be practical rather than ideological.
之所以在伊拉尅問題上如此討價還價，是因爲目前最大睏難不是主導政府意識形態的問題，而是是否有可操作性的問題。
Reasonable people can disagree as to whether the bargain is worth it, but it is a bargain on the margins.
理性的人可以對這筆交易是否值得産生質疑，但這筆交易是走在討價還價的邊緣。

Secretary Gates said there are some "exaggerated concerns" in the region that a so-called "grand bargain" with Iran will be negotiated in secret and then sprung on the region without warning.
Some analysts have suggested that the Obama administration move to dramatically change the nature of the U.S.-Iran relationship through a so-called "grand bargain" by,for example,making some concessions on regional security issues in return for an end to Iran's nuclear program and its interference in Iraq and Afghanistan.

Just think of how many little ideas it will take to hammer out each point of a grand bargain on economic policy.
FORBES: Racking Up Ideas, on the Cliff
The prime example is the so-called Super Committee charged with arriving at a grand bargain on the long-term budget, taxes and spending.
FORBES: Can Politicians be Forced to Rise Above Politics?

If you have not bargained for or bargained on something that happens, you did not expect it to happen and so feel surprised or worried by it.