过去四年粮价上涨幅度之大，在过去几十年未曾出现过。
Over the past four years prices have been more volatile than they have been for decades.
在过去几十年，雇员与雇主协商雇佣条件时通常都已失去了立场。
In the past few decades, workers have generally lost ground against employers in negotiating terms of employment.
建议的方法还将减少在过去几十年让企业饱受其害的那些“经典”老问题。
The proposed approach will also alleviate the classical legacy issues that have been plaguing enterprises over the past several decades.
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