This simple test provides doctors with early warning of the onset of the disease.这项简易化验能够对医生发出疾病出现的预警。

atmospheric conditions that are early warnings of tropical storms作为热带风暴预警信号的大气状态

The group has an impressive record for giving early warnings of environmental hazards.该小组以往在提供环境灾害预警方面的表现令人印象深刻。