Your hands, up close, are anything but smooth. With peaks and valleys, folds and rifts, there are plenty of hiding places for a virus to stick. If you then touch your face, the virus can infect you. But there are two extraordinarily simple ways you can keep that from happening: soap and water, and hand sanitizer. So which is better?

你的手，近距离观察，并不光滑。有峰有谷，有褶皱，有裂缝，有很多藏身之处可以让病毒附着。如果你再触摸你的脸，病毒就会感染你。但有两种格外简单的方法可以防止这种情况发生：肥皂和水，以及洗手液。那么，哪种方法更好呢？