牽引力

motive force / traction

to lead along / to pull (an animal on a tether) / (bound form) to involve / to draw in

to pull / to draw (a cart) / to tow

to pull; to draw (a cart); to tow

to draw (e.g. a bow) / to pull / to stretch sth / to extend / to lengthen / to involve or implicate in / to attract / to lead / to guide / to leave / to provide evidence or justification for / old unit of distance equal to 10 丈[zhang4], one-thirtieth of a km or 33.33 meters

gravitation (force) / attraction

power / force / strength / ability / strenuously