It's common knowledge that smoking and cancer are closely linked.

众所周知，吸烟和癌症是密切相关的。

youdao

Exposure to ultraviolet light is closely linked to skin cancer.

受紫外线照射与皮肤癌紧密相关。

《牛津词典》

Life quality is closely linked to surrounding environment.

生活质量与周围环境紧密相关。

youdao

The Great Spirit was closely linked with nature.

VOA: special.2009.01.05

Consumer spending accounts for about 70 percent of the U.S.economy and is closely linked to unemployment.

VOA: standard.2010.01.29

"It is clear that he was keener than the official policy on engaging and negotiating with the Taliban, so that could be connected with it or potentially the new government wanting someone who maybe wasn't as closely linked with the previous government here in the U.K."

VOA: standard.2010.06.22

It also slowed data flows over closely linked networks and led to a massive police investigation.

BBC: Dutchman arrested over huge web attack

Russia and China are now more closely linked economically and politically than they have ever been.

FORBES: Marco Rubio's Standard, Predictable, and Utterly Conventional Russia Policy: Been There, Done That

Though he is closely linked to Mr Prescott, he is keen to stress his commission's independence.

ECONOMIST: Transport