他们争论道，既然我明天可能不在世上，为什么还要存钱呢？
Why bother saving when I might not be here tomorrow, they argue.
如果你真的不相信你的肉体会消亡，你为什么还要费心写遗嘱呢？
If you didn't really believe that your body was going to die, why would you ever bother writing a will?
在树木将叶绿素分解，以尽可能多地将其回收的时候，为什么我们还要保护叶绿素呢？
Why protect chlorophyll at a time when the tree is breaking it down to salvage as much of it as possible?
既然您的资历很适合写历史小说，为什么还要写一部设定在未来的小说呢？
Why write a novel set in the future when your credentials are perfect for a historical novel?
如果从食物中获取蛋白质如此容易，为什么在你当地的果汁店还要用粉末、零食棒或强心剂来添加更多呢？
If it's so easy to get your protein in food, why add more in the form of powders, snack bars or a boost at your local juice bar?
如果我们了解自己的想法，为什么还要从我们的行为中揣测自己的偏好呢。
If we knew our own minds, why would we need to guess what our preferences are from our behaviour.
你必须提交你的成绩单，还要写一些文章，例如你为什么想去布朗大学。
You have to submit your test scores, and you have to write some essays, like why you want to go to Brown.
“海蒂，”克拉拉说，“你把罗特麦耶小姐惹得那么生气，为什么还要说喵呢？”
"Heidi," said Clara now, "why do you always say 'meow' again, if you see that Miss Rottenmeier is angry?"
不管我做什么都没有区别，那为什么还要费心去做呢？
为什么铁路公司还要费心印制时刻表呢？
Why did the railway company even bother to print a schedule?
为什么我们还要决定是否去追求真相？
你为什么还要邀请那样一个混蛋呀？
既然你可以驾车，或者更好一点，坐飞机，为什么还要骑几百英里的自行车？
Why ride hundreds of miles on a bicycle when you can drive in a car, or better yet fly in a plane?
当你能够漫步到花园的围墙外进入到广阔的互联网时，为什么还要待在那个封闭的区域里呢？
Why stay within a closed community when you can roam outside its walled garden, into the wilds of the internet proper?
那么，你们究竟为什么还要每次都回来呢？
季札的随从不明白他的举动，说道：“先生，徐王已经去世了。你为什么还要把剑送给他？”
Ji Zha's attendants didn't understand his action, saying, "Sir, the king of Xu is already dead. Why do you still give up your sword to him?"
如果你知道你的电脑会储存信息，为什么你还要把它储存在你自己的个人记忆里，你的大脑里？
If you know your computer will store information, why do you store it in your own personal memory, your brain?
这位年轻的钢琴家说：“如果输了，就仔细想想为什么输；如果赢了，就更加努力。我还要多加练习提高水平，通过钢琴将古典音乐真正的美展现出来。”
"If you lose, think carefully about it, and if you win, just work harder," the young pianist said, "I still need to practise more to become better, to bring out the real beauty of classical music through the piano."
一天，卖供猫食用的肉的商贩对他说：“你为什么不停止为人类看病，转而为动物看病呢？我相信你对动物的了解比大多数兽医还要多。你写了一本关于猫的好书。我会把所有带着生病的猫狗的人都送到你这里来。”
One day, the cat's-meat-man said to him, "Why don't you stop being a doctor for people and become a doctor for animals instead? I'm sure that you know a lot about animals-more than most vets. You wrote a wonderful book about cats. I'd send all the people with sick dogs or cats to you."
那么，他们为什么还要这样做呢？
既然我们从来都没有用过为什么还要更改它？
这有点类似世界和平，那么为什么还要去尝试呢？
It's kind of like world peace and so therefore why even try?
那为什么还要起诉，想给他定罪呢？
因此为什么还要担心IP欺骗呢？
那到底为什么我们还要关心效率呢？
既然云都没了，那我为什么还要活着？
为什么还要让他们的生活经受更大的波折呢？
为什么还要让他们的生活经受更大的波折呢？
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