Specifically, it's always the z that forms the sigma orbital, and the reason is at least at a minimum for this class we always define the internuclear axis as the z axis, so this is always the z axis, so it's always going to be the 2 p z's that are coming together head-on.

特别的，z总是形成sigma轨道，这是因为至少在这个课里面,我们总是定义核间轴为z轴，所以这总是z轴，所以2pz轨道总是,朝一个方向出现。

麻省理工公开课 - 化学原理课程节选

Before the game, Nets interim head P.

WSJ: Blatche leads Brooklyn bench over Wizards, 106-101

All five regular starters were on the floor for Brooklyn after Nets interim head coach P.

WSJ: Lopez, Blatche help Nets hold off Pistons, 103-99

Winn, whose penchant for self-promotion is detailed in another book, Dot Bomb, by company p.r. head J.

FORBES: Internet hype survives even when the dot-com doesn't.