In general, concrete or damp earth would represent a fair compromise for neutron, as well as for gamma-ray, shielding . 一般说，混凝土或湿土是护防中子和射线的相当满意的防护体。
The earth is a spacecraft too, our atmosphere acting as a shield against harmful radiation and space debris . 地球跟宇宙飞船完全一样，其周围的大气对有害的辐射和宇宙碎片起到防护作用。
Such laboratories are designed and equipped for physical containment and are posted with biohazard warning symbols . 这样的实验室是为了物理防护措施而设计与装备的，而且贴出生物危险警告标志。
Thermosetting resins impart durable press or wash-and-wear properties to the fabric and improve the fastness of the repellent . 热定型树脂给织物添加永久性定型或洗穿性能，并改进防护剂的牢固性。
"shock proof" insulated testing handles should be provided with the tester, to assure adequate protection for the operator . 这种试验器应装有“耐冲击”的绝缘试验柄，以保证对操作人的可靠防护。
Progress in repellent finishes has followed logical path, from occlusive coatings to those that permit the fabric to breathe . 防护整理上沿着正确合理的道路前进，即从堵塞式涂胶进步到通风透气的整理。
Since the thermal radiation largely stopped by ordinary opaque materials, buildings and clothing can provide protection . 既然普通不透明的材料可以在很大程度上阻止住热辐射，建筑物和衣服就能起防护作用。
Operating and maintenance personnel must be adequately protected from the electrical hazards associated with open electric elements . 运行和保养人员必须对裸线式电热元件的电气危险性，有相应的防护措施。
The experience of remaining on the roof night after night under fire, with no protection but a tin hat, soon became habitual . 人们虽一夜复一夜地冒着敌人的轰炸呆在房顶上，除一顶钢盔之外别无其他防护，但不久就习惯了。
Raises safety coefficient by improving production link 真空断路器过电压及其防护
