on duty as a guard or lookout; vigilant; alert

Английский Язык - Английский Язык

Определение on duty as a guard or lookout; vigilant; alert в Английский Язык Английский Язык словарь

on the watch

The department also notified its Bureau of Forestry and Electricity to be on the watch for ice on trees and power lines.

Расстановка переносов

on du·ty as a guard or lookout; vigilant; a·lert