keep night watch 意味

• 宿直する、夜警をする、夜番をする
  

例文

1. however , officials had to keep night watch by rotation , but they were not allowed to take compensatory leave .
   ただし、交代で宿直人と呼ばれる宿直担当者が置かれるが、代休は無い。
2. by making warriors stay and keep night watch at the imperial palace , kiyomori showed his clear support for nijo .
   清盛は天皇の皇居に武士を宿直させて警護することで、二条支持の姿勢を明確にした。