protective gas保护气体protectiveadj.保护的；防卫的protective connecting with nought保护接零protective mechanical ventilation保护性机械通气protective cultivation techniques保护性耕作技术protective physiological property保护性生理特性protective cultivation technology保护性耕作技术protective towards one's children袒护自己的孩子protective and therapeutic effects防治作用protective fire fighters' clothingprotective endotracheal intubation保护性气管插管protective rate of BCG vaccination卡介苗接种保护率

1. The Sri Lankan government has called on civilians trapped in territory held by the Tamil Tigers to move to a demarcated safe zone.
   斯里兰卡政府呼吁被困于泰米尔伊拉姆猛虎解放组织范围的平民移到划定的安全区。
2. The latter can be used to prevent the surge current or overload currents from the security zone transmission to the dangerous place to ensure the reliable isolation security.
   后者采用能防止浪涌电流或过载电流从安全区传输到危险场所的高度可靠的隔离措施来保证安全。
3. Protection zones of all grades shall be indicated by clear geographic demarcations.
   各级保护区应当有明确的地理界线。
4. To conduct engineering by putting any part of lifting machinery into the overhead power line protection zones.
   起重机械的任何部位进入架空电力线路保护区进行施工。