Air purifiers list their air filtration capabilities in terms of room size and frequency of air exchanges, sometimes listed as clean air delivery rate (CADR) or you may see a number for cubic feet per minute (CFM). A smaller unit might say it can exchange the air in a 500-square-foot room twice per hour. So that model should be able to pass all of the air in a 250-square-foot room through the filter every 15 minutes, but a 1,000-square-foot room would probably be outside its effective range. Of course, there’s no standard for manufacturers to adhere to when it comes to these calculations, but typically, larger air purifiers can handle large rooms.
02:58, 9 марта 2026Мир
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Елена Торубарова (Редактор отдела «Россия»)
这个“中国方案”的影响力正在持续发酵。2026年10月，被誉为歌剧界“奥斯卡”的多明戈国际歌剧大赛将首次落户中国高校，由上海音乐学院承办。1997年，廖昌永曾获该赛事冠军。2025年，上音学生章奥哲时隔20年再夺帕格尼尼金奖，一个细节让廖昌永感到自豪，“他是用中国作品参赛的，用陈钢先生创作的《阳光照耀着塔什库尔干》和《苗岭的早晨》。这说明，除了《梁祝》，我们还有更多的优秀作品可以走向世界”。