Whether play occurs or not depends on the intention of the animals, and the intentions are not always clear from behaviors alone.
玩耍的发生与否取决于动物的意图，而这些意图并不总是仅从行为上就能看出来的。
Firstly, it provides vital information about the way that people evolved—information not always easily obtainable from excavated artefacts alone.
首先，它提供了关于人类进化方式的重要信息——仅从出土文物中很难获得这些信息。
Not a word had escaped Heidi, until she now said, "I can go up alone from the village."
海蒂一个字也没漏掉，直到她说：“我可以一个人从村子里走。”
Instead they were all inside, alone or in groups of two or three, their faces a few inches from a screen, their hands doing things Montessori surely did not imagine.
相反，他们都在室内，一个人或两三个人一组，他们的脸离屏幕只有几英寸，他们的手做着蒙特梭利绝对想象不到的事情。
Instead, they were all inside, alone or in groups of two or three, their faces a few inches from a screen, their hands doing things Montessori surely did not imagine.
相反，他们都在室内，一个人或两三个人一组，他们的脸离屏幕只有几英寸，他们的手做着蒙特梭利绝对想象不到的事情。
To keep children away from danger, we warn parents not to leave children at home alone.
为了让孩子远离危险，我们警告父母不要把孩子单独留在家里。
But this did not prevent him from traveling alone.
但这并不妨碍他独自旅游。
He said such standards differ from person to person. But he will not be alone in suggesting that India has been measured against unreasonably high benchmarks.
但并非只有他一个人提出，印度受到了不合理的高标准的衡量。
States that any provisions which differ from this Agreement are offered by that Contributor alone and not by any other party; and.
指出任何与本协议不同的规定都是由贡献者单独提出的并不是任何其他方；和。
Even if an attacker gained access to the hashed version of your password, it's not possible to reconstitute the password from the hash value alone.
即使一个攻击者获得权限看到你经过hash的密码，也不可能只从hash值重建密码。
Nobody yet knows which, if any, of these models will work, but it is clear that revenue from online advertising alone will not be enough to cover the costs of running a traditional news organisation.
虽然仍然没有人知道这些模式中那个将可行，如果有的话，但是可以明确的是仅仅从网上的广告收入是不足够维持一个传统新闻机构的运行成本。
"You are not alone," Mr Nakata said with messages from all over the world for the survivors of the disaster.
“你并不孤单，”中田先生带着来自世界各地的祝福对灾害幸存者说。
And the contagion risk would be bigger than from restructuring alone: if Greece left, why not Portugal or even Spain and Italy?
同时蔓延的风险比重组的要高得多：如果希腊离开了欧元区，那么葡萄牙、西班牙和意大利为什么不离开？
We have more work to do, however, and change will not come from Washington alone.
但我们依然任重而道远，变革将不仅仅来自华盛顿。
Well, you're not alone. Because scientists have found that, in the absence of visible landmarks or cues from the sun, people who are lost can't walk a straight line.
不过，这种事情并非只发生在你身上，因为科学家们发现，在没有可见标志物或者没有太阳提供线索的时候，迷失的人们不会走直线。
While in trees, the brothers said, they sometimes catch glimpses of people who do not know they are being observed, or overhear snippets of conversation from those who imagine that they are alone.
兄弟俩说，在树上待着，有时候会观察到一些并不知道自己正在被观察的人，也会听到一些以为在独处的人们的只言片语。
Britain is not alone in experiencing renewed stresses in the money markets, which have sprung from increased anxiety about Banks' creditworthiness.
英国并不是在货币市场上重新经历压力而导致对于银行信用的担忧日益加剧的唯一国家。
Judging from the developer feedback I hear, you're not alone asking yourself that crucial question.
我从开发人员的反馈得知，不只您一个人自问那个妙极了的问题。
His older brother is not motivated and I can learn from his statements that his brother leaves his parents alone and lives like a jobless hooligan.
他的哥哥不长进，虽然我对他家了解不多，可是从他的语气我看得出，他哥哥根本不理他父母的生活，在外面像个无业流氓一样。
He emerged from the car accident alive but alone, there and not there: a young man whose eyes opened yet whose brain seemed shut down.
他是这起交通事故的唯一幸存者，得救了却又没救了：年轻男子的眼睛睁着，但大脑似乎已经停止了工作。
This anguish was mingled with her terror at being alone in the woods at night; she was worn out with fatigue, and had not yet emerged from the forest.
焦灼又和独自一人深夜陷在林中的恐怖心情绞成一团。她已困惫不堪，但还没有走出那林子。
“Texting and I. M. ’ing my friends gives me a constant feeling of comfort,” wrote one student. “When I did not have those two luxuries, I felt quite alone and secluded from my life.
“和朋友们发短信和聊天能一直给我一种快乐的感觉，”一位参与调查的学生写道，“当我失去这两种渠道时，我感觉非常孤独和隔离。
Mr Madoff, who was sentenced in 2009 to 150 years in prison, has adamantly maintained he acted alone. That has not spared others from suspicion.
麦道夫先生在2009年被判监禁150年，他坚称仅自己涉案，但是这并没有另其他人摆脱嫌疑。
A few months from now, she says, words alone will not be enough.
她说，如果几个月之后还看不到行动的话，会让人感到失望。
Reverend Mother: Maria, you will not be alone. Remember, I will lift up my eyes on to the hills from whence cometh my help.
嬷：玛丽亚，你不会孤独的，记住，我抬眼遥望群山，那儿我的帮助就会降临。
And cats do not seem to suffer as much as dogs from being alone if the owners are away.
当主人不在时，独自在家的猫似乎比狗所受的痛苦要少些。
New York is not alone. States from California to Mississippi are expanding managed care.
除了纽约，加利福尼亚州和密西西比州也在扩大管理式医疗的队伍。
India, which has never signed the NPT, does not yet have any American-built reactors, let alone the spent fuel from them to reprocess.
但印度并未签署NPT，也没有美国造的反应堆，遑论从美国购买再加工的核燃料。
And I know I'm not alone in receiving those gifts from you.
我知道很多人都接受了你的这些礼物。
And I know I'm not alone in receiving those gifts from you.
我知道很多人都接受了你的这些礼物。
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