常見例句雙語例句This problem demonstrates why the energy density of gravitational field is negative.本題演示為何重力場(chǎng)的能量密度是負(fù)的。The emission current density of the field emitter is primary determined by the surface field strength of the cathode.在計(jì)算場(chǎng)致發(fā)射體陰極發(fā)射電流時(shí)，影響發(fā)射電流的主要因素是陰極表面的電場(chǎng)強(qiáng)度。Week 16 Energy of point charges system, energy of electric field in capacitor , energy and its density of electric field.第16周點(diǎn)電荷系的能量；帶電電容器儲(chǔ)存的能量；電場(chǎng)的能量和能量密度；應(yīng)用舉例。原聲例句So, instead of having the periodic variation of water, or the periodic variation of air density here we're talking about an electric field.不像水或者空氣密度的,周期變化，我們這里,討論的是電場(chǎng)。麻省理工公開課 - 化學(xué)原理課程節(jié)選 返回 density of field