目前，士兵需身负多层防护衣以抵御不同级别的严寒天气。
Right now, soldiers tote around multiple layers that offer different levels of cold and wet weather protection.
英国拥有15所“四级防护实验室”，即最高生物安全级别实验室。
In Britain, there are 15 "Containment level Four" laboratories, the maximum biosecurity level, across the country.
实验室感染可发生在不同级别的实验室，甚至是生物安全防护实验室；
Result The laboratory infection may occur in laboratories at different levels, even in the laboratories with biological safe protection.
应用推荐