well grounded
adjective uk/ˌwel ˈɡraʊn.dɪd/ us/ˌwel ˈɡraʊn.dɪd/
基础扎实的;根据充分的
being based on or having a good knowledge of facts
The young players all seemed very well grounded in the rich history of the music they were performing. 这些年轻的演奏者似乎对他们所演奏音乐的悠久历史都非常了解。
The claim must be well grounded in fact. 这种断言必须有充分的事实根据。
[ before noun ] a well-grounded criticism 有理有据的批评