pin down

柯林斯词典

1. PHRASAL VERB If you try to pin something down, you try to discover exactly what, where, or when it is. 弄明确
It has taken until now to pin down its exact location. 一直到现在才确定了它的准确位置。
I can only pin it down to between 1936 and 1942. 我只能将其确定在1936年到1942年之间。
2. PHRASAL VERB If you pin someone down, you force them to make a decision or to tell you what their decision is, when they have been trying to avoid doing this. 迫使…明确表态
She couldn't pin him down to a date. 她未能迫使他确定下日期。