yè / shì / shè / bèi / bāng / zhù / xún / luó / rén / yuán / zài / hēi / àn / zhōng / guān / chá / zhōu / wéi / qíng / kuàng

夜视设备帮助巡逻人员在黑暗中观察周围情况。

Night-vision equipment helps patrol officers observe their surroundings in the dark.