geomagnetic secular variation

常見(jiàn)例句

No anomalous local secular geomagnetic variation has been found in the area.
測(cè)區(qū)內(nèi)未發(fā)現(xiàn)有侷部地磁長(zhǎng)期變化異常。
According to observation data at geomagnetic stations in Hebei Province from 1986 to 2005, we sum up and analyze the laws of the geomagnetic secular variation in this paper.
利用河北省地磁臺(tái)1986～2005年的地磁觀測(cè)資料，對(duì)該地區(qū)地磁場(chǎng)長(zhǎng)期變化槼律進(jìn)行縂結(jié)分析。
According to the observation data at Guangzhou geomagnetic observatory from 1958 to 1995, we summarize the laws of the geomagnetic secular variation in Guangzhou geomagnetic observatory.
本文利用1958～1995年已正式出版的《地磁觀測(cè)報(bào)告》資料對(duì)廣州地磁臺(tái)地磁場(chǎng)的長(zhǎng)期變化進(jìn)行分析研究。