1.deputy chair of board2.vice-president (of a university etc)
1.worm-gear pair2.worm drive3.worm and worm gear
sub-prefecture-level city (county level division, administered by province, not under a prefecture)
binormal vector (to a space curve)
1.election assistant2.running mate
副省级城市副省級城市 subprovincial city (having independent economic status within a province)
(file) extension (computing) (Tw)