Warning: file_put_contents(/www/wwwroot/ppbbbu/202081.com/cache/2b3411e118f646eebe10010664839df6.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbbu/202081.com/index.php on line 55 mono-particle是什么意思，mono-particle的翻译，mono-particle音标、读音、用法和例句_2020年的事情英文词典
A respirator is designed to protect the person wearing the respirator against breathing in very small particle aerosols that may contain viruses. 呼吸器是为保护使用者的呼吸，防止吸入空气中非常微小的颗粒物气溶胶设计的，这些气溶胶中就会包含有病原微生物。