The Bell 430 helicopter disappeared while flying through a heavy rain storm, en route to an unannounced inspection of a local district.

VOA: standard.2009.09.03

s We are back over to E as a function of n, l, m and s, only we got there through this other torturous route.

我们回到将E作为函数n，l和，只要我们解决了这个烦人的路径。

麻省理工公开课 - 固态化学导论课程节选

s We are back over to E as a function of n, l, m and s, only we got there through this other torturous route.

我们回到将E作为函数n，l和，只要我们解决了这个烦人的路径。

麻省理工公开课 - 固态化学导论课程节选