And we know why kids drop out.
我们知道孩子们为什么掉队辍学。
问…我们知道为什么吗？
If frogs ever become endangered, we know why.
如果青蛙可能濒临灭绝的话，我们知道是什么原因了。
Now we know why. They were looking for a phantom suspect.
现在我们知道为什么找不到嫌疑人了——嫌疑人根本就不存在。
Now we know why: it seems nickel imitates the action of bacteria.
现在我们了解了为什么会这样：看上去是镍模仿了细菌的行为。
我们了解他们为什么离家出走吗？
And I guess, looking back, we know why.
回头看看，我想我们知道原因。
Do we know why we have become human beings?
我们是否知道为什么我们已成为人类？
I guess we know why they didn't ask for money.
我想我知道了为什么他们不要钱了。
When a newly married man looks happy, we know why. But when a ten year married man looks happy, we wonder why.
当新婚男人看上去很幸福，我们知道是为什么。但结婚十年的男人看上去很幸福，我们想知道是为什么。
Nor do we know why these artists picked such an inaccessible spot to display their genius – though fortunately it can be reached easily today.
我们也不知道为什么这些艺术家选择了这样一个难以到达的地方来施展他们的天赋，不过好在我们现在能够很容易地抵达这个地方。
"We think we know why now; we think we were inducing the wrong immune responses." If we can use this knowledge to induce the right immune responses, we hope to really knock this on the head.
我想我们现在知道为什么了：我认为我们引发了错误的免疫反应，如果我们利用现有知识能够引发正确的免疫反应的话，我们就能一举攻克这个难题。
我们知道孩子们为什么学不下去。
我们知道为什么。
We know why people don't cook, or at least we think we do: they're busy;
我们明白人们不做菜的原因，或者至少我们以为该是如此：他们太忙了；
We know why we have got here and we are capable of winning every game and winning the championship and that is why we are focused.
我们知道为什么我们处于这样的位置上，我们能够赢得每场比赛，赢得冠军，这就是我们专注的原因。
We know why we have got here and we are capable of winning every game and winning the championship and that is why we are focused.
我们知道为什么我们处于这样的位置上，我们能够赢得每场比赛，赢得冠军，这就是我们专注的原因。
应用推荐