When I put a test branch in the tube, I aligned the zero degree mark on one compass to match up with the first offshoot branch.
我把被测试的树枝放入这个试管，将一支量角器的零刻度线对准第一个侧枝。
2
They can go from 40 miles an hour to zero and land on a branch that’s moving, all in a couple of seconds.
在几秒种的时间里，它们便能将飞行速度从64公里每小时减为零，并落在树枝上。
3
Considering meshed network of distribution feed lines and node zero injection, we put forward a algorithm of status estimation based onbranch currents.