洗掉面膜 wash the mask off
A：How long should I leave the mask on my face?
我应该让面膜在脸上敷多长时间？
B：Wash the mask off in fifteen minutes.
十五分钟后洗掉面膜。
◆ wash off 洗掉，冲洗
往脸上敷面膜 spread a mask on one's face
A：My skin tends to be oily.
我的皮肤偏油性。
B：You can try spreading a mask on your face every day. It's fairly useful.
你可以试着每天往脸上敷面膜。相当管用的。
tend /tend/ v. 倾向，趋于