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1·It is clear that imperatives other than profits or nationalism will have to compel human beings to leave their tracks on the planet's reddish surface.

很明显，除了利益和民族主义，其他紧急的事物将迫使人类在地球表面留下他们的足迹。

2·Although their missions blended commercial and political-military imperatives, the explorers involved all accomplished some significant science simply by going where no scientists had gone before.

虽然他们的任务混合了商业和政治军事的需要，但相关的探险者都完成了一些重要的科学任务，因为他们去了以前没有科学家去过的地方。

3·There are several imperatives underlying this principle.

这一原则下有若干隐含规则。

4·Yet strategic imperatives may prompt some countries to overlook such concerns.

但要必须解决的战略储备问题可能促使一些国家忽略掉这些担忧。

5·The model structures described in this articles are guidelines, not imperatives.

这些文章中介绍的模型结构是指南，不是强制的。

6·These were the twin imperatives learned from the calamities of the early 20th century.

这两项使命源自于上世纪初期的灾难。

7·Just being online is not enough to leverage digital channels to drive business imperatives.

仅仅建立网络业务，并不足以利用数字渠道以推动业务。

8·He then offered a new set of five imperatives and goals for management in the 21st century.

然后，他提供了21世纪的管理5个势在必行的目标。

9·Every character requires memorization; every sentence must conform to structural imperatives.

每个字都要死记硬背，每个句子都要符合造句规则。

10·This is a major balance of payments issue and the imperatives for developing domestic aircraft are great.

这是一个重要的收支平衡问题，自主开发飞机的要求非常迫切。

祈使句

1·Under the guidance of speech ACTS theory, this dissertation gives a full and systematic discussion of Chinese directives and imperatives.

本文以言语行为理论为指导，全面、系统地讨论了指令行为及汉语祈使句的特征。

(1)imperative sentence祈使句；命令句

(1)imperative mood祈使语气；命令语气；祈使式