涨知识：防晒霜打开后可以用多久?

　　In the four of a new weekly series, in association with LloydsPharmacy, a trained pharmacist answers your common medicine queries...

　　在四大每周新系列中，一名训练有素的药剂师携手劳埃德药店回答您的常见医药问题…

　　Some suncreams have expiry dates, while others carry a symbol showing how many months it can be used for once opened, explains Colin Dougall from LloydsPharmacy in Glasgow.

　　一些防晒霜标明了截止日期，而另一些则带有显示一旦打开后可以用多久的标记，来自格拉斯哥的劳埃德药房的科林.杜加尔解释说。

　　If the product has neither, NHS Choices suggests a shelf life of two to three years if it’s stored correctly, ie, in a cool, dry place.

　　如果在该产品上两者都没有标注，英国健康搜索引擎(NHS Choices)建议如果储存正确的话，即保存在阴凉，干燥的地方，保质期为两到三年。

　　After the expiry date - or if it’s been stored in a hot car for the summer – your suncream may degrade and not protect you as well from the sun so it’s probably best to discard it and buy a new one next season.

　　到期之后—或者如果它一夏天被放在闷热的车里，你的防晒霜可能会变质，便不能保护你远离阳光照射，所以最好丢掉它，等到下个季节再买一个新的。

　　But if you’re applying suncream regularly – it should be reapplied several times a day and after swimming, even if it is waterproof – you’re unlikely to have much left after your holidays anyway.

　　但是，如果您定期使用防晒霜，每天重复使用很多次，游泳后也会用，即使它是防水的，相信你的假期过后，它也不可能剩下多少了。