关于人类为什么哭的时候会流泪，科学家已经提出了很多理论。
Scientists have advanced many theories about why human beings cry tears.
科学家提出了许多关于人类为什么哭的理论，但没有一个得到证实。
Scientists have advanced many theories about why human beings cry tears, none of which has been proved.
“你为什么哭呢？”另一个孩子说。
奶奶困惑地问：“为什么哭啊？”
哈薛说，我主为什么哭。
参观者：你为什么哭？
“你为什么哭呢？你知道，我是多么爱你呀！”渔夫说。
Why your eyes are full of tears? You know, I love you deeply. "The fishermen says".
我不知道他们为什么哭，但我知道那眼泪来自他们的内心！
I don't know why they are crying. But I know the tear is from their hearts.
今日科学时刻叶将向大家解释为什么哭的时候眼睛会浮肿。
In this Moment of Science yael explains to Don why our eyes get puffy when we cry.
对于初为父母的人来说，有时候很难弄清楚到底孩子为什么哭。
Sometimes, for a new parent, it can be very difficult to work exactly what your baby is crying about.
嗯，我认为你的裙子真漂亮。告诉我，小姑娘，你为什么哭呢？
Well, I think it's very pretty, so tell me little one, why are you crying?
“我知道啊，哎呀，你别急，一个大男人的哭什么哭，我还没死呢。”巧儿烦了。
"I know, oh, you don't urgently, crying of a big male what call, haven't I died." The Qiao son is getting more vexed.
他看到小女儿正在哭泣，于是比划着问她为什么哭，女儿的手指向了她妈妈的车。
He signaled to her, asking about the reason for her tears. She pointed to her mother's car.
“他为什么哭呢？”一条绿色的小蜥蜴高高地翘起尾巴从他身旁跑过时，这样问道。
"Why is he weeping?" asked a little Green Lizard, as he ran past him with his tail in the air.
她把头埋在手臂里不断地哭，一直到都忘了自己为什么哭了，才合上眼睑在美丽的夜空下渐渐睡去。
She buried her head in her arms and cried and cried, till she forgot what she was crying about, and just rested in the beautiful darkness behind her eyelids.
妈妈告诉安娜2018年还会有世界杯的，这可对她源源不绝的眼泪毫无作用。显然，妈妈并不懂宝贝为什么哭。
The suggestion that there will be another World Cup in 2018 does nothing to stem the water works. Clearly, mom just doesn't get it.
为什么父母会对他们的孩子说“没什么好哭的”？
Why do parents say "It's nothing to cry about" to their children?
当你改变不了什么时，哭是没有用的，所以要有耐心。
When you can't change anything, crying is useless, so just be patient.
当你认为自己错了的时候，你可能会觉得很糟糕。当孩子们表达他们的感受，却被告知这没什么可哭时，他们就会认为自己有错。
You may feel bad when you believe you are wrong. When children express their feelings and are told that it's nothing to cry about, they come to know that they themselves are bad.
你可不要以为不管约瑟夫说什么，我都会哭；可是他和哈里顿真是极为讨厌的同伴。
You wouldn't think that I should cry at anything Joseph could say; but he and Hareton are detestable companions.
她是：“我凡是在温伯格的实验室里对老鼠做了什么每次都会哭。”
“In Weinberg’s lab I would start to cry every time I had to do anything with a mouse, ” she says.
人生短短几十年，不要给自己留下了什么遗憾，想笑就笑，想哭就哭，该爱的时候就去爱，无谓压抑自己。
Your life only lasts for a few decades, so be sure that you don't leave any regrets. Laugh or cry as you like, and it‘s meaningless to oppress yourself.
那个小男孩在哭，看上去在向他妈要着什么东西，年轻的妈妈想，这个小孩一定是要糖果或是口香糖之类的玩意儿，而他妈妈又不给，所以才闹得这么厉害。
The child was crying and begging for some special treat. He wants some candy or gum and his mother won't let him have any, she thought.
那个小男孩在哭，看上去在向他妈要着什么东西，年轻的妈妈想，这个小孩一定是要糖果或是口香糖之类的玩意儿，而他妈妈又不给，所以才闹得这么厉害。
The child was crying and begging for some special treat. He wants some candy or gum and his mother won't let him have any, she thought.
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