入射角等于反射角.The angle of incidence equals the angle of reflection.冬季小入射角阳光的透射可以增加室内亮度.Low - angle winter sunlight penetration can give rise to glare.这种情况中的入射角是三十度.The incident angle in this case is 30 degree....
从该液体中最先逸出的气泡是空气和氢的混合物.The first bubbles to escape from the liquid are a mixture of air and hydrogen.更为活跃的是氢的较重同位素, 氘和氚.More reactive are the heavier isotopes of hydrogen, deuterium and tritium.惰质体是低氧低氢的类木炭物质.Inertinities...