n.重力；万有引力，地心引力；重要性，严重性；严肃，庄重 双语释义：n.(名词)[U]地心引力,重力 on the earth pulls them towards the center of the planet, so that things fall to the ground when dropped[U]严重性; 严肃,庄严 importance seriousness; solemnity英英释义： gravity[ 'ɡræviti ]n.(physics) the force of att