pin down
动词- To attach or secure with pins. · Pin down the tablecloth, so it doesn't blow away in the breeze.
- To identify something (e.g. a decision or plan) clearly or specifically. · Something is wrong, but I can't pin it down.
- To hold the opponent back-first so both his or her shoulders touch the mat or ground.
- To corner somebody in order to get a firm answer. · Let's try to pin him down on a price.
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