pin down

verb

1. define clearly

e.g. I cannot narrow down the rules for this game

Synonym: peg downnail downnarrow downnarrowspecify

2. attach with or as if with a pin

e.g. pin up a picture

Synonym: pin up

3. place in a confining or embarrassing position

e.g. He was trapped in a difficult situation

Synonym: trap

1. 确定；证实
If you try to pin something down, you try to discover exactly what, where, or when it is.

pin down的解释

e.g. It has taken until now to pin down its exact location...
直到现在才确定了它的准确位置。
e.g. I can only pin it down to between 1936 and 1942...
我只能确定是在1936至1942年期间。

2. 迫使…作出决定（或明确表态）
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.

e.g. She couldn't pin him down to a date...
她没有办法强迫他答应约会。
e.g. ...their repeated efforts to pin him down on a number of topics...
他们迫使他对一系列问题明确表态的再三努力

1. 阻止：pimply 肿泡的 | pin down 阻止 | pin money 零花钱

2.

2. 船首前倾：pin connecting 销连接 | pin down 船首前倾 | pin drill 针头站

3. 牵制：pin dot matrix ==> 针点矩阵 | pin down ==> 牵制 | pin drafter ==> 针梳机,针梳牵伸机