短語詞組短語secular gravity variation 長(zhǎng)期性重力變化secular variation trend 長(zhǎng)期變化趨勢(shì)geomagnetic secular variation [地物]地磁長(zhǎng)期變化the secular variation 變化特點(diǎn)secular variation features 長(zhǎng)期變化特征paleomagnetic secular variation 古地磁場(chǎng)長(zhǎng)期變化secular variation detail 長(zhǎng)年變化magnetic recording wire secular variation 地磁長(zhǎng)期變化secular variation of geomagnetic field 地磁場(chǎng)長(zhǎng)期變化 返回 secular variation