1 the sun [sing] the star that shines in the sky during the day and that gives the earth heat and light 太阳: The sun rises in the east and sets in the west. 太阳从东方升起，在西方落下。the rays of the sun 太阳光 ☞picture at the solar system 见the solar system插图

2 [sing] [U] light and heat from the sun 太阳的光和热 [sing] Don't sit in the sun too long. 别在阳光下坐太久。Too much sun can be harmful. 晒太多阳光可能有害。