Competition can be healthy, but if it is pushed too far it can result in bullying.
竞争可以是良性的，但如果被推向极端，就会导致恃强凌弱。
From there he wonders, I can doubt my senses, but can I doubt that I am sitting in this room?
他从那里开始想，我可以怀疑我的感官，但我能怀疑我坐在这个房间里吗？
Multiculturalism can be a rewarding, enriching experience, but it can also lead to a clash of values.
多元文化主义可以是一种有意义且丰富的经历，但它也可能导致价值观的冲突。
Curiosity is often considered a good instinct—it can lead to new scientific advances, for instance—but sometimes such inquiry can backfire.
好奇心通常被认为是一种有益的本能——比如它能带来新的科学进步——但有时这种探究可能会适得其反。
But the costs to the whole society can actually be quantified and, when added up, can amount to staggering sums.
但对整个社会来说，其成本实际上是可以量化的，如果把它们加起来，可能会达到惊人的数额。
But those who truly understand the economic impact and can work to change the patterns can create a wide range of career possibilities.
但是，那些真正了解经济影响并能够努力改变这种模式的人可以创造广泛的职业机会。
Houses have been split and collapsed, but we can build them again. So long as people are alive, we can still pull through and conquer the major natural disaster.
房屋已经倒塌，但我们可以重建它们。只要人活着，我们就一定能够渡过难关，并战胜这场重大的自然灾害。
You can thaw out the seafood before cooking it, but if you do this, make sure you cook it as quick as you can.
你可以在烹饪之前先将海鲜解冻，但是如果你这样做的话，一定要尽快地把它煮熟。
We can earn more money in the future, but I'm not sure we can change men's attitudes.
将来我们可以赚更多钱，但我不确定我们能否改变男人的态度。
Wellness may perhaps best be viewed not as a state that people can achieve, but as an ideal that people can strive for.
也许最好不要把健康看作是一种可以实现的状态，而是一种可以为之奋斗的理想状态。
Policy is policy after all, but you can make an exchange and you can use the credit for your books for next semester.
政策毕竟是政策，但是你可以进行交换，你可以用学分来换取下个学期的书。
Travel insurance can be arranged easily online or over the phone, but you can always turn to your local travel agency.
在网上或电话上可以很容易地安排旅游保险，但你总是可以向你当地的旅行社求助。
You can book the courts for thirty minutes or an hour, but you can carry on playing until the next players arrive.
你可以预定30分钟或1小时的场地，但是你可以一直打到下一个球员来。
We can believe the molecular data, the DNA, or we can believe the skeleton trail, but unfortunately, not both.
我们可以相信分子数据和DNA，或者我们可以相信骨架线索，但不幸的是，我们不能两者都相信。
Not all casualties can necessarily be prevented but by coordinating across local, state, and even national borders, officials hope that the worst-case scenario can be averted.
并不是所有的伤亡都可以避免，但通过各地方、各州、以及国家间的协调，官员们希望可以避免最坏的情况。
But can artificial intelligence (AI) machines act ethically, meaning can they be honest and fair?
但是，人工智能机器能依据道德行事吗？也就是说，它们能做到诚实和公平吗？
It is known that noise pollution from offshore industry, shipping and sonar can impair underwater communication, but can it really drive whales onto our beaches?
众所周知，来自近海工业、船舶和声纳的噪音污染会阻碍水下通信，但这些噪音真的能把鲸鱼赶到我们的海滩上吗？
Glenn Schellenberg admits that practice can change certain areas of the brain but doubts that the change can affect other areas.
格伦·舍伦贝格承认，练习可以改变大脑的某些区域，但怀疑这种改变是否会影响其他区域。
Everybody can buy takeaway food, but sometimes we're not aware how cheaply we can make this food ourselves.
每个人都可以叫外卖，但有时我们并没有意识到自己做这些食物会有多便宜。
Everybody can buy takeaway food, but sometimes we are not aware how cheaply we can make this food ourselves.
每个人都可以叫外卖，但有时我们并没有意识到自己做这些食品会有多便宜。
Not all casualties can necessarily be prevented—but by coordinating across local, state, and even national borders, officials hope that the worst-case scenario can be averted.
不是所有的伤亡都一定可以预防——但是通过地方、州、甚至和国家边境的协调，官员们希望可以避免最坏的情况。
Therefore, DIY can bring us fun and help us save money, but it is not always as easy as it is thought to be if we bite off more than we can chew.
因此，自己动手做（DIY）可以给我们带来乐趣，帮助我们省钱，但如果我们不自量力，它并不总是像想象的那么容易。
You can not only browse discussions and questions that your classmates have asked, but you can certainly ask questions of your own.
你不仅可以浏览其他人的讨论和同学们提出的问题，还可以提出自己的问题。
Cans can hold what they can, but can not hold things that can't be canned.
能装进罐头的东西就可以装进罐头，不应该被装进罐头的东西就不能装进罐头。
The particular design of muscles and bones in the neck and limbs of the turtle allow that it can draw in its exposed parts such that an attacker can find nothing but hard shell to bite.
海龟颈部和四肢的肌肉及骨骼的特殊设计使它能把暴露在外的部分缩回去，这样攻击者只能去咬坚硬的外壳。
Now I'm really fantastic at drawing this mechanical device, but you can imagine that dropping weight can cause a paddlewheel to turn.
现在我真的很沉迷机械装置，但是你可以想象重物掉落的时候会带动桨轮旋转。
Day after day, you'll have new experiences which can be scary, but it can also be fun.
日复一日，你会有新的经历，可能是可怕的，但也可能是有趣的。
You can log into this, not only chat with this interactively, but on the right-hand side here, you can actually grant us view or control of your own screen.
你可以登录这个，不仅仅是与这进行交互式聊天，在右边这里，你可以让我们查看或控制你自己的屏幕。
But the ease with which we imagine details can lead to unrealistic expectations and can bias our decisions.
但我们对细节轻易作出的想象可能导致不切实际的期望，并使我们的决定产生偏差。
To begin with, only by taking actions can we find the best way to solve those problems we are facing, but as a bystander, we can learn nothing meaningful.
首先，只有采取行动，我们才能找到解决这些问题的最好方法，但仅仅旁观的话，我们学不到任何有意义的东西。
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