pre·cau·tion·ar·y
adjective/prɪˈkɔːʃənəri/
/prɪˈkɔːʃəneri/
- done in order to prevent problems or to avoid danger
预防措施；预防；防备 - He was kept in the hospital overnight as a precautionary measure.
为了谨慎起见，他被安排整晚留院观察。
- He was kept in the hospital overnight as a precautionary measure.