Their cancers are not so clearly tied to radiation exposure.

　　他們的癌癥與接觸輻射并沒有太明顯的聯系。

　　Exposure to lead is known to damage the brains of young children.

　　已知接觸鉛會損害幼童的大腦。

　　Daniel's early exposure to motor racing did not excite his interest.

　　丹尼爾早期對賽車運動的接觸并沒有激起他的興趣。

　　There is a direct correlation between exposure to sun and skin cancer.

　　皮膚暴露在太陽下與皮膚癌直接相關。