More recently, however, some companies have been investing money in a more ambitious undertaking: learning how to adjust the fundamental make-up of the food they sell.
2016年12月四级真题（第二套）阅读 Section C
英语六级真题
Why is Google undertaking such a venture?
出自-2011年12月阅读原文
It is basically a social undertaking.
出自-2010年6月阅读原文
柯林斯高阶英汉双解学习词典释义
N-COUNT
（尤指艰巨的）任务，工作，事业
An undertaking is a task or job, especially a large or difficult one.