"I don't know why they left," he said dolefully.
“我不知道他们为什么离开，”他悲伤地说。
It's a complete mystery to me why they chose him.
我真无法理解他们为什么会选他。
There is no earthly reason why they should ever change.
他们毫无理由改变。
I cannot for the life of me imagine why they want to leave.
我怎么也想象不出他们为什么要走。
He says that he understands why they behaved so appallingly.
他说他明白为什么他们表现得如此让人震惊。
To understand why they are doing it, it is necessary to know where they are coming from.
要理解他们为什么这样做，有必要知道他们的想法。
This is why they must be free.
这就是为什么他们必须是免费的。
他们为什么不高兴？
The man asked why they had done this.
那人问他们为什么这样做。
No one knows why they were painted there.
没人知道为什么它们会被画在那里。
Why they respond to advertising as they do?
为什么他们会对广告做出如此反应？
She wondered why they hadn't given her an answer.
她纳闷他们为什么不给她一个答复。
They got caught. Do you know why they got caught?
他们被抓了，你知道为什么会被抓吗？
Don't you want to know why they are so successful?
你难道不想知道他们为什么这么成功吗？
She asked them why they hadn't turned the lights on.
她问他们为什么不开灯。
Everybody makes mistakes; that's why they put erasers on pencils.
每个人都会犯错误，这就是为什么人们把橡皮装在铅笔上。
They were made from hard plastics and that's why they were very breakable.
它们的制作材料是硬塑料，这就是它们极其易碎的原因。
European researchers are studying bats to understand why they live so long.
欧洲研究人员正在研究蝙蝠，以了解它们长寿的原因。
I've never understood why they give you so much popcorn! It tasted pretty good, though.
我真不明白他们为什么给你这么多爆米花！不过味道还不错。
Immigrant parents could talk about their country of origin and why they emigrated to the United States.
移民家庭的父母可以谈论他们的原籍国以及他们移民到美国的原因。
Middle-class families see their graduate offspring on the dole queue and wonder why they bothered paying school fees.
中产阶级家庭发现自己的孩子们在毕业后出现在领救济金的名单上，不明白为什么他们会饱受学费的困扰。
When Captain Cook asked the chiefs in Tahiti why they always ate apart and alone, they replied, "Because it is right."
当库克船长问塔希提岛的酋长们，为什么总是和其他人分开并单独吃饭，他们回答说：“因为这是正确的。”
The large, rich peony flowers look great in the gardens and this is exactly why they are often seen as part of outdoors arrangements.
花园里，花朵大大的、富丽堂皇的牡丹花看上去美极了，这正是为什么它们经常被视为户外布景的一部分。
Nobody knows the Arctic as well as the locals, which is why they are not content simply to stand back and let outside experts tell them what's happening.
没有人比当地人更了解北极，这就是为什么当地人不满足于不发表任何看法，只让外界的专家来告诉他们发生了什么。
Based on excavations, we can know the layout of the houses and the location of the graves, but we're only guessing when we tried to say why they did it that way.
根据挖掘的情况，我们可以知道房子的布局和坟墓的位置，但是我们试图解释他们这样做的原因时只是瞎猜而已。
The very reason that clichés so easily seep into our speech and writing—their insidious memorability—is exactly why they played such an important role in oral storytelling.
陈词滥调之所以如此容易渗透到我们的演讲和写作中，是由于它们潜在的可记忆性，这正是它们在口述故事中扮演如此重要角色的原因。
I think it is so stupid of people to do bad things to the earth that they are living on! I can't understand why they are doing these. People should care about the environment.
我认为人类在破坏他们赖以生存的地球是愚蠢的！我不明白他们为什么这么做。人类应该关心环境。
It's hard to understand why they would not be affected, whereas dinosaurs were left too crippled to cope, especially if, as some scientists believe, dinosaurs were warm-blooded.
很难理解为什么它们不会受到影响，而恐龙却因为残疾而无法生存，尤其是如果恐龙像一些科学家认为的那样是温血动物。
"Even though we asked the management, they refused to give us detailed answers as to why they would do this with their collection," continued the source, who left her role within two weeks.
“尽管我们询问了管理层，但他们拒绝向我们详细回答他们为何这样处理这批时装。”这位消息人士继续说。她在两周内离了职。
Both of these dancers knew why they attracted the attentions of two hot-blooded young men.
这两名舞蹈演员都深知自己何以吸引了两位热血青年的注意力。
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