They were passed down orally within cultures from generation to generation, so they changed a lot over time.
它们是在某一文化领域内代代口头相传下来的，所以随着时间的推移，它们也发生了很大的变化。
I spend so much time travelling that I've got packing down to a fine art.
我常常旅行，这就把打点行李学到家了。
At about age 15 or so, the men voluntarily began cutting down their nightly sleep time because of pressures from school, work, and other activities.
在大约15岁左右的时候，由于学校、工作和其他活动的压力，这些男性自愿开始减少夜间睡眠时间。
But at about age 15 or so, the men voluntarily began cutting down their nightly sleep time because of pressures from school, work, and other activities.
但在大约15岁左右的时候，由于学校、工作和其他活动的压力，这些男性自愿开始减少夜间睡眠时间。
The hyperbolic surface, which has so-called negative curvature because its surface curves up and down at the same time, like a saddle.
双曲曲面，即通常所称的负曲率，因为它的表面同时向上和向下弯曲，就像一个马鞍。
This time, she turned down the fire so it cooked nicely.
这一次，她把火关小了，所以面包烤得很好。
If your parents are having problems, you should offer to help. Maybe you could do more jobs around the house so that they have more time for proper communication. Secondly, why don't you sit down and communicate with your brother?
如果你的父母有问题，你应该主动提供帮助。也许你可以多做些家务，这样他们就有更多的时间进行适当的交流。第二，你为什么不坐下来和你哥哥交流呢？
Our bodies like consistent patterns , so we should let them know that it’s time to wind down.
我们的身体喜欢一致性，所以我们应该让他们知道是该松弛下来的时候了。
So, over time, the fission reactions will still slow down and stop.
所以，随着时间流逝，裂变反应会慢下来并会停止。
Your intelligence is so low you'd slow even them down, giving the rest of us more time to escape.
你的智商是如此之低，你可以用来拖住僵尸们，给其他人逃跑的时间。
Bridges are flimsy by comparison to islands (and even more so to worlds!). They can be torn down by storms or time.
与岛相比，桥非常脆弱(更不用说跟世界相比了！)。他们轻易地就会被风暴吹倒或者时间所。
In a sequence diagram, the sequence of messages is shown positionally: time proceeds down the page, so a message low in the diagram is sent after a message that is above it.
在一个顺序图中，消息的顺序用它们的位置来表示：按照时间顺序从上到下排列，因此排在下面的消息就在排在上面的消息之后发生。
At the same time, other students in the same class already have the skill down cold, so further practice for them is a waste of time.
同时，同一个班级的其他学生可能已经熟练掌握了这项技能，所以继续练习对他们来说只是浪费时间。
Put the computer to sleep, so that the next time the recipient sits down at the computer, she receives your apology.
让电脑进入休眠状态，这样下次对方坐在电脑前时就会收到你的道歉啦。
He wanted to be on time for work, so he wrote down what that would entail: waking up, showering, dressing, preparing breakfast, eating, driving, parking and buying coffee-all before 9 a.m.
他想要按时工作，所以他把需要做到的都写下来：起床、淋浴、更衣、准备早餐、吃饭、开车上班、停车和买咖啡——所有的这些都要在早晨9点之前完成。
They knew that I was down so deep that if they started to dig with shovels, they’d never reach me in time.
他们知道我被埋在地下很深的地方,如果一开始就用铲子挖,绝对没法及时把我挖出来。
Judging from the campaign so far, they certainly have the best hope in a long time of taking down a prized GRC.
从迄今为止的竞选情况判断，他们肯定拥有长期以来夺取宝贵集选区的最大希望。
Set a regular bed time for yourself and use an evening routine to wind down so you don’t have trouble sleeping.
你可以为自己制定有规律的作息时间，并且及时放松，这样你就不会有任何睡眠问题。
Buildings are flaky they burn down all the time, so how do we make sure that there is a remote copy of your data in another location, that's the simple stuff.
楼房可能很脆弱，他们随时可能被烧毁，所以我们如何确保，在另一个地方我们的数据也有备份，这都是比较简单的事务。
He comes back here on a regular basis so next time he's down I might have a quiet word in his ear, but it's for him to make that decision.
他有足够的实力进入苏格兰国家队。他还是会定期回来，所以下次他回来时我会跟他谈谈心里话，但这需要他自己做决定。
This is because trees suck up carbon dioxide as they grow, so every time forests are chopped down it reduces the Earth’s ability to absorb the greenhouse gas.
这是因为，树木在生长过程中吸收二氧化碳，因此，每次砍伐森林都会降低地球吸收温室气体的能力。
A faint wind, more like a moving coolness than a stream of air, passed down the glade from time to time; so that even in my great chamber the air was being renewed all night long.
一阵阵微风，时不时的刮过这片空地，与其说是一股气流，不如说是凉意在流动；就这样，就算是在我的巨大房间里，空气也整夜都是新鲜的。
Keep a journal with you at all times so that you can capture your idea and enjoy your down time.
保证日记随身，你就可以随时记录下你的想法，然后好好享受假期。
If you like a glass of wine in the evening, have it with dinner — around 6 p.m. rather than 11 — and drink in moderation, so it'll wear off by the time you lie down.
假如你喜欢在晚上喝上一杯酒，那就在晚餐时喝吧，大约6点而不是11点，饮酒适量，这样在你睡前酒劲就会散去了。
I can't recall how many times I have told people about this concept but I haven't ever written it down-so now is the time.
我已经记不清多少次和人们提起这个概念，然而我甚至从未把它写下来——现在该是时候了。
In all of these years of watching her suffering so much, this was the first time I broke down.
这么多年来，一直看着她如此痛苦，而这是我第一次崩溃。
Worse, time spent without a book breaks down your reading habits so it can be harder to start again.
更糟的是，中断读书的时候无形中也中断了读书习惯，再开始就很难了。
Everything is almost over. The enemy is down, so now is the time for the interview.
一切结束，敌人被消灭了，现在是采访时间。
Everything is almost over. The enemy is down, so now is the time for the interview.
一切结束，敌人被消灭了，现在是采访时间。
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