It's important to put a lock washer on that last nut, or it can work loose.
重要的是要在最后一个螺母上安装一个防松垫圈，否则它会逐渐变松。
When snowfalls on high mountains or in polar regions, it may become part of the glacial system.
当雪落在高山或极地地区时，它可能成为冰川系统的一部分。
Only an aggressive research and development program might find ways of breaking our dependence on fossil fuels or dealing with it.
只有积极的研究发展项目才能够摆脱我们对化石燃料依赖，或找到解决这一问题的方法。
Put the word "Breath" as a screensaver or desktop pic, or put it up as a note on your wall, fridge, or your desk.
用“呼吸”一词设为屏幕保护程序或桌面图片，或把它作为一个便条贴在您的墙壁、冰箱或办公桌上。
Pedals apparently has an injured leg or paw that doesn't allow it to walk comfortably on all fours according to experts.
据专家说，显然 Pedals有一条腿或一只熊掌受伤，这使它不能舒服地用四肢行走。
The bike that the service company provides has GPS or Bluetooth on it.
该服务公司提供的自行车上有GPS或蓝牙。
The bike that the service company provides has GPS or Bluetooth on it, and those bikes can be easily unlocked with a smart phone and left anywhere in public.
这家服务公司提供的自行车上装有 GPS或蓝牙，这些自行车可以用智能手机轻松解锁，还可以停放在公共场所的任何地方。
If you have a cold or flu, you'd better not pass it on to anyone else.
如果你得了感冒或流感，最好不要把它传染给别人。
I want to work at home on a Tuesday but as it turns out sometimes it's a Wednesday or a Thursday.
我想在星期二在家里工作，但结果是有时是在星期三或星期四。
We can sleep on the beach. I don't mind roughing it for a night or two.
我们可以睡在海滩上。我不在乎吃一两夜的苦。
It typically takes a day or two, depending on size.
这通常需要一天或两天，依大小而定。
It took an extraordinary effort to focus on preparing his classes or correcting his students' work.
集中精力去备课或批改学生的作业费了他相当大的劲。
He must have thought Jane was worth it or he wouldn't have wasted time on her, I suppose.
我想，他当时肯定认为简值得他费心思，否则他就不会在她身上浪费时间了。
The report has been rejected by the authorities, who said much of it was based on supposition or inaccuracy.
当局驳回了该报告，称其中许多内容来源于主观臆测，并不准确。
Give away any food you have on hand, or lock it up and give the key to the neighbours.
把你手头的食物分发送人，或锁藏起来，把钥匙交给邻居们。
The game is poised on a knife-edge. One mistake or one piece of good luck could decide it.
比赛形势扑朔迷离。一个失误或是一点运气就有可能决定胜负。
Are you remembering what it is used for, or the sound it makes when the teacher writes on the blackboard?
你记得它的用途或者当老师在黑板上写字时它发出的声音吗？
When people pour old motor oil on the ground or throw it in the garbage, it pollutes the environment.
当人们把旧机油倒在地上或扔到垃圾里，它会污染环境。
You can't see it, smell it, or hear it, and people disagree on how precisely to define it, or where exactly it comes from.
你看不见它，闻不到它，也听不到它，并且人们对于如何准确地定义它，或者查明它的来源也存在分歧。
Is he thinking, blinking, or sleeping on it?
他是在思考、眨眼还是在上面睡觉？
The markets have failed to zero in on this problem, because of all the other squeaky wheels in the global economy, but sooner or later, they will latch on it.
由于全球经济中所有其他吱吱作响的车轮，市场未能关注到这个问题，但迟早他们会意识到这一点。
Does it lift your spirits on a bad day, or does it annoy you because there's nothing happy about this particular holiday this year?
它会让你在糟糕的日子里振作起来，还是会让你因为今年这个特别的节日没有什么快乐的事情而烦恼？
If you put a stone in the way of an ant, it will go around, over, under or on top, without stopping, until it finds a way to get where it needs to be.
如果你用石头挡住蚂蚁的去路，它会不停地绕道、从上面越过、从底下或从顶部走，直到它找到一条通向目的地的路。
Success authors usually serve up vivid stories about how exceptional businesspeople stamped their personalities on a company or rescued it from a life-threatening crisis.
成功的作家通常会生动地讲述杰出的商人如何在一家公司打上他们个性的烙印，或如何将公司从危及生命的危机中拯救出来。
You may never know whether spending a fortune on pomegranate juice or the like is worth it.
你可能永远不知道花一大笔钱买石榴汁或类似的东西是否值得。
You can do it indoors on special walls or outdoors on real mountains.
你可以在室内特殊的墙壁上做，也可以在室外真正的山上做。
Once we've read the material, we want to discuss it or hear it elaborated on, not repeated.
一旦我们读了材料，我们想要的是讨论内容或听到更多细节，而不是材料的重复。
Don't walk on the grass, or it will "cry".
不要践踏草地，否则小草会“哭”。
Life can be easy or difficult, sometimes it depends on how you look at it.
生活可以容易，也可以困难，有时这取决于你如何看待它。
Whether the homework is good or bad depends on the purpose of it.
家庭作业的好坏取决于其目的。
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