利用对比连词while引导两个分句，清晰地界定了不同人群的行为模式。
Seize opportunities when they arise; do not let them slip away, or you will regret it later.
Pay attention to every fleeting moment; if opportunity comes and you fail to grasp it, you will regret it for a lifetime. ——Anonymous
Whichever day you decide to act, that day shall be your auspicious day. ——Anonymous
If you weep because you lost the sun, you will also lose the stars. ——Tagore
He who does not wait for the gifts of opportunity has conquered fate. ——Arnold
Mediocre people complain about their circumstances, while great people strive to change them. ——Anonymous
The sole purpose of our birth is to live well—for ourselves, for those who love us, and for those who look down on us. ——Anonymous
A timely opportunity is like a market transaction; if you delay even slightly, its value will diminish. ——Bacon
We are like seagulls meeting the waves: we encounter, we approach, but then the seagull flies away and the waves roll on, and we part ways. ——Tagore
Once we attract enough attention and play our part in this world, we start rolling like a ball, never to stop. ——Heine
Without careful preparation, even opportunity becomes useless. ——Tocqueville
把握机遇，当抓紧时机，切莫在错失后追悔莫及。
要留意每一个转瞬即逝的机会，若机会降临而未能把握，终将留下终生的遗憾。 ——佚名
想哪天干，那天就是吉日。 ——佚名
如果你因失去了太阳而流泪，那么你也将失去群星了。 ——泰戈尔
不等待机会所送礼物的人，就是征服了命运。 ——阿诺德
庸人埋怨自己的境遇不佳，伟人则努力改造环境。 ——佚名
我们降生在这个世界上的唯一目的，就是好好活下去——活给自己看，活给爱自己的人看，更要活给那些瞧不起自己的人看。 ——佚名
幸运的时机好比市场上的交易，只要稍有延误，它就将失去价值。 ——培根
我们如海鸥与波涛相遇：遇见，靠近，随后海鸥飞去，波涛滚滚流开，我们也随之分别。 ——泰戈尔
一旦我们在世界上吸引了足够的注意并扮演好角色，我们就会像球一样滚动起来，从此奔流不息。 ——海涅
如果事先缺乏周密的准备，机遇也会毫无用处。 ——托克维尔