@happyhexer @wsbgnl And how do "Americans" use the ventilation tool anyway? Most places people go they have no visibility of the ventilation and even modest measures, such as San Fran requiring businesses to post a sign explaining their ventilation, were never pushed nationally and dropped in SF
@HappyHere@wsbgnl和“美国人”如何使用通风工具？人们去的大多数地方都看不见通风情况，甚至一些适度的措施，比如旧金山要求企业张贴一个解释其通风情况的标志，也从未在全国范围内推行，而是在旧金山实施