speak on good grounds; arguments bottomed on facts
Example Sentences:
1.
The final step of diplomatic research is to write a report which should be short , terse and pithy and well - grounded and it lays stress on logical thinking1 using concise language to express rich content clearly , and fast writing 外交调研的最后一环是撰写报告，成文应讲究短小精悍、逻辑思维、言之有据、表达清晰、鲜明突出、用词精炼、行文迅速。
