基本解释adj.无重量的；无重力的同根派生 英汉例句用作形容词 (adj.)Knowledge is weightless, a treasure you can always carry easily.知识是一种无重的、可以轻易携带的珍宝。Man is weightless in space.人在太空失重。We feel weightless when the elevator descends.当电梯下降时，我们会感到失重。