They circle the orbital motion the direction to be consistent (from the solar North Pole looked is counter clockwise), therefore, the scientists remove Pluto outside the nine planets.
它们绕轨道运动的方向一致(从太阳北极上看是逆时针方向)，因此，科学家们把冥王星排除在九大行星之外。
2
The design of differential stress sensor with five magnetic pole based on counter magnetostriction effect of ferromagnetic materials is given.