1·We must stand sentinel to protect ourselves; the jewels over which they kept guard were stolen.
我们必须让哨兵站岗保护我们；他们站岗保卫的宝石被盗。
2·Far more inexplicable is the decision to withdraw the Sentinel R.1 Airborne STand Off Radar (ASTOR) from service when it is' no longer required to support operations in Afghanistan '.
更令人费解的是让“哨兵”R . 1机载远程雷达(ASTOR)在“不再需要支持在阿富汗的行动”时退出现役的决定。