失重
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物(wù )体(tǐ )失(shī )去(qù )重(zhòng )量(liàng )。由(yóu )于(yú )物(wù )体(tǐ )在(zài )高(gāo )空(kōng )中(zhōng )所(suǒ )受(shòu )地(dì )心(xīn )引(yǐn )力(lì )变(biàn )小(xiǎo )或(huò )由(yóu )于(yú )物(wù )体(tǐ )向(xiàng )地(dì )球(qiú )中(zhōng )心(xīn )方(fāng )向(xiàng )作(zuò )加(jiā )速(sù )运(yùn )动(dòng )而(ér )引(yǐn )起(qǐ )。
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