Training on proper use and limitations , including practice putting the respirator on and wearing it is required 通过培训了解如何正确使用防毒口罩并认识其限制性,练习按照要求正确佩戴防毒口罩。
Update your anti - virus software regularly to detect new viruses and do not download software from sources you do not trust 你必须定期更新防毒软件,才能侦测最新的病毒,也应避免下载来历不明的软件。