例 6. Such is a human nature in the West that a great many people are often willing to sacrifice higher pay for the privilege of becoming white collar workers.

　　许多人宁愿牺牲比较高的工资以换取成为白领工人的社会地位, 这在西方倒是人之常情。

　　例 7. Insects would make it impossible for us to live in the world; they would devour all our crops and kill our flocks and herds, if it were not for the protection we get from insect-eating animals.◎

　　假如没有那些以昆虫为食的动物保护我们, 昆虫将吞噬我们所有的庄稼, 害死我们的牛羊家畜, 使我们不能生存于世