In general, although the system detects both of the human body and the helmet, it cannot be assuredoperation workers are wearing helmets.
一般而言，系统同时检测到人体与安全帽并不能认为作业人员佩戴安全帽。
2
The doctor assured us of the safety of the operation.
医生向我们保证手术的安全性。
3
This single operation, a push of the "distress button", provides automatic, direct and assured connection to a competent rescue authority, thereby avoiding and eliminating possible human error.