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(膨(péng )胀(zhàng )系(xì )数(shù )，膨(péng )胀(zhàng )系(xì )数(shù ))

物(wù )体(tǐ )在(zài )温(wēn )度(dù )上(shàng )升(shēng )1℃时(shí )所(suǒ )增(zēng )大(dà )的(de )体(tǐ )积(jī )和(hé )原(yuán )来(lái )体(tǐ )积(jī )之(zhī )比(bǐ )或(huò )所(suǒ )增(zēng )加(jiā )的(de )长(zhǎng )度(dù )和(hé )原(yuán )来(lái )长(zhǎng )度(dù )之(zhī )比(bǐ )。

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●膨胀系数（简体版）