The brains of teenagers, but not adults, showed greater activity in two regions associated with rewards when they were being observed by same-age peers than when alone.
青少年在被同龄的人观察时，大脑中两个与奖励相关的区域比独处时表现出更剧烈的活动，成年人则不然。
When I learned to ride a bike, I asked him not to leave me alone, but he said it was time.
当我学骑自行车时，我叫他不要留我一个人，但他说是时候放手了。
But I do write best when I have a lot of time alone.
但是我写的最好的时候是我有大量单独时间的时候。
But when it happens to you, you can feel very alone and unsure of what it all means.
尽管如此，当这一切发生到你头上时，你还是会感觉很孤单，不能确定这一切意味着什么。
But when we started quantifying their absorption, we realized that more light could be absorbed than predicted by the wire-packing fraction alone.
但是当我们开始确定它们的吸收率时，我们意识到仅硅线包装部分就能吸收比预测量更多的光。
Traveling with a friend can be an adventure too, but the adventure quotient is usually higher when you are alone.
和朋友一起旅行也可以是冒险，但只有你一个人时冒险的份量通常会更高。
When asked how he watched television, he gave an answer that described his behaviour when he was alone, and thus did not have to compromise. But most of the time he watched with other people.
与其说这位小伙子撒了一个小慌，不如说他误读了调查项目的问题——他以为观看电视节目指的是单独一人收看(也就不用迁就他人)，而实际上他大部分的时间是和其他人一起看电视的。
GA alone is useful when you can define the fitness, but you can't easily optimize it.
当您可以定义适合度时，GA本身是实用的，但是您不容易优化它。
But when he is in a bad mood, he likes to sit alone.
但当他心情不好时，他喜欢独自坐着。
When people say everyone dies alone, they don't mean to be saying you die, but not in the presence of others.
当人们说大家都孤独而死，他们不是说你死亡的时候，身边没有他人。
But there was something wrong with all of them: they were apathetic, withdrawn, happiest when left alone.
他们所有人都有些问题：他们对什么都漠不关心，内向孤僻，一个人的时候却很开心。
But without a parable spake he not unto them: and when they were alone, he expounded all things to his disciples.
若不用比喻，就不对他们讲。没有人的时候，就把一切的道讲给门徒听。
But sometimes a stunning view alone is inspiration enough: 'I know when I'm in front of a view that's really interesting,' says Brooks.
但有时一处极富魅力的景色本身就能带来足够的灵感：‘当我置身于一处着实有趣的景色前，我是了然的，’布克鲁斯说。
Mr. Feng had many friends when he was in a purple patch but now that he has gone bankrupt,he finds himself alone and friendless.
在顺境的日子里冯先生朋友很多，现在一旦破产，他发觉自己一个朋友也没有，非常孤独。
Players still will be able to control the fighters — which are the enemy when a player is playing the game alone — but they will be referred to simply as "Opposing Force."
玩家们依旧能够控制这些士兵，但当只有一个玩家单独玩这款游戏时这些士兵默认为敌军，他们只是简单的被称为“敌对武装”。
When Liu Lu got married last winter, she and her husband spent 4,000 yuan ($506) on wedding photos alone but decided to skip pre-marital medical check-ups , which cost about 100 yuan ($12.70).
去年冬天结婚的刘璐夫妇仅拍结婚照就花了4000元，但他们却没做仅需要花费100元左右的婚前医学检查。
But Big Ben isn't alone; architects have been correcting the Leaning Tower of Pisa since the 1170s when it was still being built.
不过并非只有大本钟如此。比萨斜塔自12世纪70年代还在建造之时到现在一直不断得到建筑师们的矫正。
Various studies show health benefits when participants eat an apple between three and five times a week, but all ailments cannot be cured by diet alone.
各种研究表明当参加者每次吃一个苹果一周3到5次的确有益健康，但单吃苹果对所有小病都不能治愈。
And likewise, leave it alone if your friend asks you to; but be there when they need you.
同样地，要是朋友叫你别管，那就别管；当他们需要你的时候，你就出现。
Perhaps it is one of those "moments of truth" when a person suddenly stands outside all relationships; he is in public, but alone with himself.
也许这是那些当一个人突然摆脱全部关系，发觉“真相大白”的时刻中的一个；他在人群中，却全然独自一人。
But the poor little motherless child, when she found herself alone in the wood, and saw nothing but trees and leaves, was dreadfully frightened, and knew not what to do.
但是这个可怜的失去母亲的孩子，当她发现她独自一个人在森林里，除了树和落叶她什么也看不到时，感到非常的受惊，不知道该怎么办。
Especially when I'm alone, but no-one really asked me before... I feel strengthless and hopeless.
特别是孤单一人时，但以前没人真正地问过我……我觉得既无力又绝望。
I think I'm not alone here, but if I had these habits when I was young, I'd be pretty well off now.
我觉得我不是唯一一个有这种想法的人，但是如果我小时候已经有了这些习惯，那么我现在一定已经很富有了。
Squalene alone is not an adjuvant, but emulsions of squalene with surfactants enhance the immune response when added to antigens.
角鲨烯本身并不是一种佐剂，但添加表面活性剂后的角鲨烯乳剂加入至抗原后可增强免疫应答。
Like a room full of Musical Instruments, some may excel alone, but none can match the symphony sound when all are played together.
好比一间放满乐器的房间，某件乐器可能会一鸣惊人，但所有乐器共同奏出的交响乐将无与伦比。
But what shall we say, when an individual discovers a revelation, addressed to himself alone, on the same vast sheet of record!
但是，当某人发现出现在同样大幅的卷面上的一个启示只是针对他一人的时候，我们又该作何评论呢？
But at times when you are alone and quiet, you find yourself missing the warmth of the disappeared cacophony.
可是，一个人安静下来时会觉得，曾经厌烦的那些嘈杂回想起来很温情很怀念。
When people find this little furry ball on the shore, they tend to react as they would after finding a lost kitten or puppy. But these are wild animals; they have to be left alone.
当人们在海岸上发现这只小毛毛球，他们往往会做出对待失而复得的小猫咪或小狗狗时的举止，可是，这些是野生动物，不能乱碰它们。
When people find this little furry ball on the shore, they tend to react as they would after finding a lost kitten or puppy. But these are wild animals; they have to be left alone.
当人们在海岸上发现这只小毛毛球，他们往往会做出对待失而复得的小猫咪或小狗狗时的举止，可是，这些是野生动物，不能乱碰它们。
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