make a mental reservation 心存保留
with mental reservation 含糊其辞
1. He answered the question with a certain mental reservation.
他回答问题时在言语中带着某种保留意见。
2. The agreement was signed, but there was much mental reservation among the partners.
协议虽然签署了，但合伙人之间仍存有很大的保留态度。
A: Do you fully support this new policy?
A：你完全支持这项新政策吗？
B: I said yes, but I have some mental reservation about the cost.
B：我说了支持，但我对成本方面存有保留意见。
1) 指在表达观点时，内心其实持有不同意见或保留意见
2) 指通过含糊其辞的方式来规避直接的承诺或真相
3) 法律或宗教语境中指在表态时隐瞒真实意图
1. 心中保留意见；心存保留
e.g.
His statement was characterized by mental reservation.
他的陈述具有含糊其辞的特征。
noun phrase
1. The act of making a statement while secretly intending something else or withholding information to avoid full commitment.
Synonym: evasion, equivocation