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- Beyond the social obligations, romantic inclinations and heed our biological imperative (like so many spawning salmon), why are we willing to put ourselves through such ma fan in our relationships? 除了社会责任，对浪漫关系的向往和生理驱动（就像成群产卵的大马哈鱼），我们为什么非得将自己投入到如此麻烦的关系当中呢？
- At the same time, we also control our biological imperatives: we can choose not to reproduce without giving up any of our higher-level needs. 同时，我们还控制了自己的心理因素：我们能在不放弃任何高层次需求的同时选择不繁殖后代。
- Job creation has become an imperative for the government. 创造就业机会是政府必须做的事。
- It is imperative that we make a quick decision. 我们要尽快做出决定。
- This revolutionary book demonstrates that sexual behavior is driven by neither the psyche nor the conscious mind, but by biological imperatives programmed into us millions of years ago. 以上，我已经简单论述了处女情结产生的两大因素：社会文化（婚姻）因素与生物遗传因素。
- Survival is our first imperative. 我们当务之急是设法生存下来。
- Some biological molecules have the form of a helix. 有些生物分子呈螺旋状。
- The school has a large biological laboratory. 这所学校有一个很大的生物实验室。
- It's imperative that you apologize to him immediately. 你必须立即向他道歉。
- biological imperative 生理的必然性
- An immediate operation was imperative. 非立刻动手术不可。
- The convention bans the stockpiling of biological weapons. 该公约禁止储存生物武器。
- Change was unsettling, but also imperative. 变动使人心烦，可是又少它不得。
- It is imperative that we win today. 它是命令哪一我们赢今天。
- To look out. Often used in the imperative. 当心。常用于祈使句中
- The application of mathematical principles to biological processes. 生物数学应用于生物学过程的数学原理
- It was imperative to counter this trend. 反击这股思潮是必要的。
- It is imperative to conduct psychological warfare. 进行心理战是必要的。
- It is imperative for us to act at once. 我们必须马上行动。
- The discovery, I apprehend, is not imperative. 我认为，这个发现不是必不可免的。
