Modern techniques for producing and shipping food led to greater variety and quantity, including a tremendous increase in the amount of animal protein and dairy products available, making us more vigorous than our ancestorsYet plenty has been lost too, even in cultures that still live to eat.

出自-2016年6月阅读原文

During 26 vigorous exercise, our muscles tire as they run out of fuel and build up waste products.

2017年6月四级真题（第三套）阅读 Section A

This mission depends on traditions of rational discourse and vigorous defense of the scientific method.

出自-2014年6月阅读原文

In many of these cities such as Denver, a diverse and vigorous economy attracted to the urban core has offered stable employment for residents.

2017年12月六级真题（第一套）阅读 Section C

Reform has been vigorously opposed, perhaps most egregiously in education, where charter schools, academies and merit pay all faced drawn-out battles.

出自-2012年考研阅读原文