从一主轨道转到一岔线上。

To switch from a main railroad track to a siding.

youdao

一旦您设置水平和平移，记录到一个专用的立体声主轨道的组合。

Once you set levels and pan, record your mix onto a dedicated stereo master track.

youdao

由于国际空间站距离地面只有220英里，且位于卫星相撞轨道下方271英里处，因此主碎片云进入国际空间站的机率很小。

The space station is in no danger of entering the main debris clouds because it is orbiting just 220 miles above Earth, or 271 miles below the orbit of the collision.

youdao

l So, if we're talking about a 4 p orbital, and our equation is n minus 1 minus l, the principle quantum number is 1 4, 1 is 1 -- what is l for a p orbital?

我们方程是n减去1减去，主量子数是，4，1是1，--p轨道的l是多少？,学生：

麻省理工公开课 - 化学原理课程节选