1. N-UNCOUNT Gravity is the force that causes things to drop to the ground. 地球引力; 重力

Arrows would continue to fly forward forever in a straight line were it not for gravity, which brings them down to earth. 要不是重力使箭掉落地上，它將會(huì)一直沿直線往前飛行。

2. N-UNCOUNT The gravity of a situation or event is its extreme importance or seriousness. (事態(tài)、事件等的) 重要

The president said those who grab power through violence deserve punishment which matches the gravity of their crime. 總統(tǒng)說(shuō)那些通過(guò)暴力攫取權(quán)力的人應(yīng)當(dāng)受到與其罪行嚴(yán)重性相一致的懲罰。

3. N-UNCOUNT The gravity of someone's behaviour or speech is the extremely serious way in which they behave or speak. (行為、說(shuō)話的) 嚴(yán)肅

There was an appealing gravity to everything she said. 她說(shuō)的一切都帶有一種吸引人的嚴(yán)肅與莊重。