U 1.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 2.严重性; 严肃,庄严 importance seriousness; solemnity
词汇搭配
动词+～
grasp the gravity 理解严重性
keep one's gravity 保持庄重
realize the gravity of the position 认识到情况的严重性
形容词+～
increasing gravity 日趋严重
介词+～
by gravity 由于重力
with gravity 严肃
句型例句
An apple falls down because of gravity.由于重力的关系,苹果往下掉。
He doesn't think you realize the gravity of the situation.他认为你没意识到局势的严重性。
Even children must behave with gravity at a funeral.即便是孩子在葬礼上也得举止严肃。
