短語詞組短語precautionary area 警戒區(qū)precautionary requirement 預防性的需求precautionary balances 預防余額precautionary principal 預防原則precautionary shutdown 預防性停車precautionary ways 防范對策precautionary management 預防管理precautionary patent 預告專利precautionary technology 防precautionary measure 預防措施；安全措施precautionary principle 預防原則；預警原則 返回 precautionary