疫情之下，戴口罩到底有没有用这个问题，让很多西方网友感到头大。
最近，国外一家公司利用Schlieren光学成像技术来比较了戴口罩与不戴口罩的区别，一起来感受一下↓↓
A simple Schlieren imaging technique is
applied to visualize the air flow caused by a person breathing and
coughing. Using a face mask the exhaled air flow is blocked
reducing effectively the risk of infection https://t.co/o1V5uYupph pic.twitter.com/bGTXqe0kUQ— Massimo (@Rainmaker1973)
April 5, 2020
Visualizing the air flow of a
(breathing/coughing) person through Schlieren imaging technique
with or without protective measures. pic.twitter.com/4DSX2fYL05— Fhd.alk (@fhdalkhaldii)
April 5, 2020
今日时事新闻网|最新的新闻时事–视频：戴不戴口罩区别有多大？国外公司做了个实验…
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