短语讲解：
1. So, I think those three factors weighed quite heavily on international prices
weigh on使苦恼
例句：The lack of money weighed on him.
缺钱用令他万分苦恼。
2. Put this in perspective means that a lot of the poorer countries or developing countries would have to pay for the food imports with (the) U.S. dollar.
put in使处于某种状态
例句：The surprise attack put me in a fix.
这次突然袭击使我处于困境。
pay for为…付钱
例句：How much did you pay for the book?
那本书你付了多少钱?
3. And this to some extent could unfortunately offset any gain received from paying lower prices
to some extent某种程度上,(多少)有一点
例句：Women have changed history to some extent.
从某种程度上讲，女人改变了历史。
4. You know it’s not going to have such a significant impact unfortunately in terms of helping these countries to cope with the high food prices, especially at the time when (there are) a lot of uncertainties in the fuel market.
in terms of就…而言, 从…方面说来
例句：He thought of everything in terms of money.
他是从钱的角度来看每一件事。
cope with对付…
例句：I don't know how she copes with looking after her family and doing a full-time job.
既要照顾家庭又要工作, 我不知道她是怎样应下来的。
