混凝土由水泥 、 砂、石子与水掺和而构成.Concrete is composed of cement, sand and gravel mixed with water.两种液体在掺和器里均匀了一下.The two liquids homogenised in the blender.两种液体在掺和器里均匀了一下。The two liquids homogenized in the blender....
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....