close的形容词和副词
closed adj. 关着的；不公开的；
closely adv. 紧密地；接近地；严密地；亲近地；
例句
The door closed behind him.
他一出门，门就关上了。
They followed other scientists closely.
他们密切地跟踪其他科学家。
He closed his eyes wearily.
他疲惫地闭上了眼睛。
His eyes were half closed.
他的双眼半闭着。
Languages and cultures are closely connected.
语言和文化是紧密相连的。
Currently, there aren\'t many CubeSats and they\'re tracked closely.
One place scientists are studying very closely is Europa, a moon of Jupiter.
科学家们正在密切研究木卫二，它是木星的卫星。