powerless

a.无能为力的

POW, powder, powder blue, powder-keg, powder-magazine, powder-puff (also puff), powder-room, powdery, power, power cut, power house, power line, power politics, power-boat, power-dive, power-point, power-station (US `power plant), powered, powerful, powerfully, powerlessly, powerlessness, powwow, pox, pp, PPE, PPS (also pps), PR, practicability, practicable, practicably, practical, practical joke, practicality, practically, practice, practician, practicing, practise, practise (US practice),