0 a strong type of sunscreen (= a substance that you put on your skin to prevent it from being damaged by the sun), that prevents any of the sun's rays from reaching the skin -- 防曬霜，防曬油
Patients with a history of skin cancer should be advised to use a broad-spectrum sunscreen or sunblock with a sun-protection factor of 15 or above.
Titanium dioxide and zinc oxide are two of the important ingredients in sunblock.
The use of the word sunblock in the marketing of sunscreens is controversial.
Although crosses and daylight are not fatal to them, they are sensitive to light, and wear sunblock and sunglasses regularly.
The wearing appropriate covering such as a rash guard (in warmer waters), a t-shirt, a wetsuit, and especially waterproof sunblock will mitigate this risk.
The regular use of sunblock can inhibit their development.
This change does not extend to imported cosmetics or to any special-use products, including hair dyes and sunblocks.
Nonetheless, many consumers use the words sunblock and sunscreen synonymously.
