The witness held back material facts, ie ones that might influence a decision.
证人隐瞒了重要事实.
辞典例句
When applying for motor insurance you must declare all material facts.
当申请机动车保险时,你必须如实填写所有的重要事实.
互联网
Facts likely to influence the judgment are called material facts.
有可能影响判断的事实称为重要事实.
互联网
You must disclose all material facts. Failure to do so may invalidate the Policy.
所有重要事实必须如实告知,否则将影响此保险合同的有效性.
互联网