要是我选择一个60度的角，这些数就会是二分之一和二分之根号三。

If I pick an angle of 60 degrees, these are some numbers like half and root 3 over 2.

youdao

如果这当中有一个负数，乘积就会变成负的，如果你对一个负数开根号，你就会得到一个虚数。

If you had one negative number in it, then the product would be a negative number and, if you took a root of that, then you might get an imaginary number.

youdao

在毁灭性的9.0级地震和海啸发生后，来自美国罗纳德•里根号航母大队的船只和飞机正在日本东北部执行补给任务。

Ships and aircraft from the Ronald Reagan Carrier Strike Group are conducting re-supply missions in northeast Japan following the devastating 9.0 earthquake and tsunami.

youdao

So, once we figure out what our probability of backscattering is, we'll just raise that to the 1/2, and we'll multiply that by 12 . 20 centimeters.

所以一旦我们,知道了散射概率，我们开根号。

麻省理工公开课 - 化学原理课程节选

If I pick an angle of 60 degrees, these are some numbers like half and root 3 over 2.

要是我选择一个 60°的角,上面的系数就会是二分之一和二分之根号三

耶鲁公开课 - 基础物理课程节选

If you had one negative number in it, then the product would be a negative number and, if you took a root of that, then you might get an imaginary number.

如果这当中有一个负数,乘积就会变成负的,如果你对一个负数开根号,你就会得到一个虚数

耶鲁公开课 - 金融市场课程节选