like: ultraviolett → →
ultraviolett ☊ 
tia tử ngoại, tia cực tím ☊ 
☊ ultraviolett ☊ 紫外线的 ☊ zǐwàixiàn de barrier against sth: Ozone is the earth's barrier against ultra-violet radiation. ☊ barrier ☊
the sun's harmful ultra-violet rays ☊ harmful ☊
link A to/with B: Exposure to ultraviolet light is closely linked to skin cancer. ☊ link ☊