ascertained造句
The previously unidentified objects have now been definitely
ascertained as being satellites.
原来所说的不明飞行物现在已证实是卫星.
I
ascertained that she was dead.
我断定她已经死了.
It'should be
ascertained if preventive or control procedures have already been attempted.
应查明是否已采取了预防或控制措施.