I told him that this is because behind this word "must" what is lacking is the spirit of negotiation.
我说，因为它背后没有协商的精神。
And it can be scary because behind us, there are often blind spots... things we want to ignore or couldn't even see that can stop us from our journey forward, but only if you let them.
这也许不是易事，因为我们身后往往是盲点，是我们想忽略的事，或是我们无法预知会让自己停滞不前的事。
It sounds paradoxical, because the idea behind this hypothesis is that the red pigment is made in autumn leaves to protect chlorophyll, the light-absorbing chemical, from too much light.
这听起来很矛盾，因为这一假设背后的理念是，树叶在秋天产生的红色素是用于保护叶绿素这种吸收光的化学物质，以免它吸收过多的光。
Rather, they are dark because of interstellar dust that hides the stars behind it.
相反，它们之所以是黑暗的，是因为星际尘埃将恒星隐藏在它的后面。
The marsupial's eye problem may be to do with her diet before she was abandoned, or because she is overweight, leading to fat deposits behind her eyes.
这个袋类动物眼部问题可能与它被抛弃前的饮食有关，也可能是因为它超重，导致眼睛后面堆积了脂肪。
Worst of all, a cheater who doesn't get caught the first time usually cheats again, not only because he/she is farther behind, but also because it seems "easier".
最糟糕的是，第一次作弊没有被抓住的作弊者通常会再次作弊，不仅因为其成绩更加落后，还因为作弊似乎“更容易”。
I can't see Lucy because she is behind the tree.
我看不见露西，因为她在树后面。
Other young people like hanfu because of the culture behind it.
其他年轻人因为汉服的文化内涵而喜欢它。
These years, Qomolangma is in danger because many people leave their waste behind, such as water bottles and plastic bags.
这些年来，珠穆朗玛峰处于危险之中，因为许多人把垃圾留在这里，如水瓶和塑料袋。
"Left-behind" children hardly ever see their parents, because their parents work in the cities, leaving them behind in the countryside to be cared for by their grandparents.
“留守儿童”几乎见不到他们的父母，因为他们的父母在城市工作，把他们留在农村，由他们的祖父母照顾。
Because of my poor pronunciation I was afraid to speak English in class. I just hid behind my textbook and never said anything.
因为我糟糕的发音，我不敢在课堂上说英语。我只是躲在课本后面，什么都不说。
He duffed the golf ball because the club stroke the ground behind the ball before hitting it.
因为击球前球杆触了球后面的地，所以他未击中高尔夫球。
What matters more than technique is the thought behind the picture, because you’ll only be sending us one.
比技术更重要的是让照片呈现的你的想法——因为我们只要你给我们传送 一张 照片。
"There shouldn't be light behind you, because it will darken your face," Rosenthal says.
罗森塔尔表示：“你的背后不应该有亮光，因为这会让你的脸色变暗。”
This is mainly because of the two ideas behind a LEDs true lifespan: Lumen Depreciation and Useful Life.
这主要是因为LED真实的寿命后面隐藏的两大概念：流明衰减和有用时间。
And we sometimes may be led astray, perhaps because a street sign is hiding behind a tree, or by a poorly marked on-ramp.
有时我们可能会被误导而引入歧途，也许是仅仅为了一棵大树后面的路牌，或者是由于一个错误的驶进坡道的标志。
That's understandable, because the idea behind string balls is that they start with a black hole that evaporates away due to Hawking radiation.
那是可以理解的，因为弦背后的理论是是它们像黑洞一样以霍金辐射的形式蒸发。
But according to the authors, this ratio exaggerates how far the poor have been left behind because it does not account for different inflation rates.
但是据作者所说，这个比例过分夸大了穷人的落后因为其并没有考虑到各自所需面对的不同的通胀率。
If we are going to be innovative with health strategies, we must make sure that women and girls are not left behind because they do not know how to use them or do not have access to them.
如果我们要使卫生战略具有创新性，我们就必须确保妇女和女童不因不会使用或者不能获得这些技术而落在后面。
The newfound hilt may have been left behind because it was unwanted, or it may have been inaccessible, according to Moore's colleague Wendy Welsh, a conservator on the project.
据此项目保管人、摩尔的同事温迪·威尔士说，这把刚刚发现的剑柄可能因为没有用被扔下的，也可能是剑柄不容易拿到手的原因。
We say push because while you are pulling content, you are hiding it behind the scenes.
之所以称为推，是因为在“拉”内容的同时，您将其隐藏在幕后。
In virtually all cases you shouldn't need to do anything in the code behind because the ViewModel takes care of providing the commands and linking between the view and the controller.
在绝大多数情况下你不需要在后台代码中做任何事情，因为视图模型负责提供命令并连接视图和控制器。
If you go to see the Mona Lisa, you'll probably be disappointed, because it's hidden behind a thick glass wall and surrounded by a frenzied crowd taking pictures of themselves in front of it.
你要是去看《蒙娜·丽莎》的话很可能会失望，因为那幅画安在一块厚玻璃当中，周围全是闹哄哄的人，争先恐后地站在画前拍照。
Years ago, many people dubbed the area La Californie because it reminded them of the hills behind Los Angeles.
几年前，该地区被许多人称为称它为加利福尼亚的香格里拉，因为它让山上居住的人们想起洛杉矶背后的山群。
At Chinese New Year, when once he would go home to visit his son, Fang must stay behind because the restaurant is so busy.
以前春节，他都要回家看儿子，但今年，他必须留守厨房，因为餐馆生意太好了。
Wilder often talked about how he wouldn't stick a camera behind a roaring fireplace because you never watch life unfold from behind a fireplace.
怀尔德经常说到，他之所以不愿把摄像机架在燃烧着的壁炉后，是因为永远也不可能从壁炉后观察到率真的生活。
Asaad said it was a hard decision as they were forced to leave her mother and other relatives behind because they couldn't get a visa.
在这里输入译文asaad说由于母亲和其他的亲属无法拿到签证而被迫留下来，这是个很艰难的决定。
The galaxy looks so good because it lies behind a galaxy cluster.
这个星系看起来这么好是因为它藏在一个星团后面。
For a while, the open source community was left behind because it lacked a similar integrated architecture.
一时之间，开源社区因为缺少类似的集成架构而被远远地抛到了后面。
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