With so many stars in space, are we alone, or is there life on other planets in space?
太空中有这么多恒星，我们是唯一的吗，或者太空中其他行星上存在生命吗？
Are we alone in this universe?
在宇宙中仅存在我们人类吗？
我们在宇宙间是孤居的？
我们真是唯一的吗？
读就只有我们吗？
只有我们吗？
"Maybe we can answer the age-old question 'Are we alone?'"
也许到时候我们就可以回答那个古老的问题了——‘我们是孤单的吗？’
We alone decide how to make the best use of the here and now.
我们自己要决定如何最好地利用此时此地。
How life originated is very closely tied to the question, are we alone?
人们对于生命的起源疑问与此息息相关，在这个世界上我们是孤独的吗？
It is that little piece of us that we alone possess hat nobody else can violate.
它是我们所拥有的那些任何人都不能冒犯的所有物的一小部分。
According to meme theory, humans are radically different from all other species because we alone are meme machines.
根据这一理论，人类与所有其他物种的本质区别在于我们是唯一的一种模因机器。
Therefore, we alone must make something of ourselves, transforming ourselves into the instruments for experiencing the deepest spiritual essence of life.
因此，我们必须做点什么，引导我们自己去经历生活最深层的精神实质。
Therefore, we alone must make something of ourselves, transforming ourselves into the instruments for experiencing the deepest spiritual essence of life.
因此，我们必须做点什么，引导我们我自己赴经历生活非常深层的精神实质。
Vasopressin, an antidiuretic hormone, is another chemical that has been associated with the formation of long-term, monogamous relationships (see "Are We Alone in Love?").
垂体后叶加压素，一种抗利尿激素，又是一种与一夫一妻制的长久关系形成有关的化学物质（见“钟情者只有我们吗？”）
We are able to ask the question "are we alone in the universe?" because our ancestors created memes, turning Earth into a "two replicator", or R2, planet, rich in language and culture.
我们能够问出“我们在宇宙中是孤家寡人吗？”这样的问题，是因为祖先创造了各种模因，使地球成为一个有着丰富的语言和文化的“双复制因子”(或称r2)星球。
我们独自站立。
We know no nation can meet the challenges and seize the opportunities of the 21st century alone—all of us have to take responsibility and work together.
我们懂得，没有任何国家能够单独应对和把握21世纪的挑战与机遇——我们大家都必须承担责任，共同努力。
As a wise man once said, we are all ultimately alone.
正如一位智者曾经说过的，我们最终都是孤独的。
"The ability to broadcast to our social group means we need never feel alone," he says.
“向我们的社会群体传播信息的能力意味着我们永远不会感到孤独。”他说道。
When he wanders along the road with his twisted stick we are all afraid to meet him alone.
当他拄着他那根弯曲的拐杖在路上闲逛时，我们都害怕单独遇到他。
We thirst, and He alone satisfies.
我们渴了，他却独自满足。
We want to know whether we are alone in the Universe.
我们想知道我们在宇宙中是否是孤独的。
We're born alone, but we are not living alone.
我们生而孤单，但并不是一个人独自生活。
In discussing whether we are alone, most SETI scientists adopt two ground rules.
在讨论我们是否孤独时，大多数SETI科学家会采用两条基本规则。
We enter the world alone, and we leave alone.
我们孤独地来到这个世界，又孤独地离开。
To protect ourselves better, we should avoid being alone outside at night.
为了更好地保护自己，在我们应该要避免晚上独自出行。
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