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. They were looking for a phantom suspect.

youdao

现在我们知道为什么包装盒是如此之大：在阿达莫是装在一个“时间胶囊”塑料外壳，而这又是在通过黑色塑料瓶盖航运航运保障。

Now we know why the packing box was so large: the Adamo is encased in a "time-capsule" plastic casing, which in turn is protected during shipping via black plastic shipping caps.

youdao

科学家们现在还不知道为什么狗反而会在测试中失败，兰奇认为可能是因为“我们训练狗注视我们的眼睛以及面部，而不是追随视线。”

Scientists don't yet know why dogs fail this test, but it may be because "we train them to look at our eyes and face and not to follow our gaze," says Range.

youdao

So when I expand this gas adiabatically and it cools down, why do you think it might cool down?

现在我们知道了气体绝热膨胀时,温度会下载，为什么会降温？

麻省理工公开课 - 热力学与动力学课程节选

All right, so let's go back to electrons configurations now that we have an idea of why the orbitals are listed in the energy that they are listed under, 2p why, for example, the 2 s is lower than the 2 p.

好的我们返回来到电子构型,现在我们有一个思路知道,为什么轨道,以能量列出来，举个例子2s低于。

麻省理工公开课 - 化学原理课程节选