Did try nailing a couple of the boards down.

我把几块板子钉下去了。

I'm just having problems nailing down a background source.

我只是在定下背景起源时碰到了一点点问题。

Others prefer to look for connections between ideas rather than nailing down facts.

另一些人则更喜欢寻找观点之间的联系，而不是弄清真相。