It was argued at the end of the 19th century that humans do not cry 13 they are sad but they become sad when the tears begin to flow.
19世纪末有人提出论点，认为人类不是因为 13悲伤才哭泣，而是当眼泪开始流的时候才变得悲伤。
But we are now knowledgeable enough to reduce many of the risks that threatened the existence of earlier humans, and to improve the lot of those to come.
但我们现在拥有足够的知识，可以减少许多曾威胁早期人类生存的风险，并改善后代人的生活状况。
Well, because it feels good 5 people place their trust in an individual or an institution, their brains release oxytocin, a hormone that 6 pleasurable feelings and triggers the herding instinct that prompts humans to 7 with one another.
因为这感觉很好，当人们将信任放在个人或机构上时，他们的大脑会释放催产素，这种激素会6愉悦感并触发促使人类7的从众本能。
Because humans have an inherent need to 1 uncertainty, according to a recent study in Psychological Science.
根据最近发表在《心理科学》上的一项研究，人类有一种与生俱来的对1的不确定性需求。
The drive to 10 is deeply rooted in humans, much the same as the basic drives for 11 or shelter, says Christopher Hsee of the University of Chicago.
人类对10的驱动力深深植根于其本性，与对11或庇护的基本驱动力大致相同，芝加哥大学的克里斯托弗·赫西表示。
例句取自历年考研英语真题，翻译为机器生成，仅供学习参考。