a substance that you put on your skin to protect it from being burned by the sun

It's important to wear sun cream when you go to the beach. 当你去海滩时，涂防晒霜是很重要的。

Most of us don't apply suncreams thickly or evenly enough, with the result that protection is patchy and ineffective. 我们大多数人涂抹防晒霜的厚度或均匀度不够，导致防晒效果不佳。