by means of; through; via; to adopt; to pass through; to get through; to switch over[cedict]
磁力线
cí lì xiànㄘˊ ㄌㄧˋ ㄒㄧㄢˋ
line of magnetic flux[cedict]
产生
chǎn shēngㄔㄢˇ ㄕㄥ
to arise; to come into being; to come about; to give rise to; to bring into being; to bring about; to produce; to engender; to generate; to appear; appearance; emergence; generation; production; yield[cedict]