同根派生 electric fields相關詞英漢例句So far we have considered the electric field only.以上我們僅僅討論了電場。They do have very strong electric fields, but the fields are mostly perpendicular to the direction of propagation.它們的確都具有相當強的電場，不過電場的方向都垂直于運動的方向。electric fields更多例句