nail down

基本解释

A few exercises helped me nail down my ultimate satisfaction-generating personal business model.
一些練習幫助我最終敲定了這個爲了創造滿足感的個人商業模式。
Starting with the frame list keeps the storyboard organized and helps you nail down the step-by-step outline before delving into the details of each frame or sketch.
以框架列表開始可以使故事板有組織，而且還可以幫助你鑽研每一框架或者示意圖細節之前確定一步步的綱要。
Moreover, new services have emergedthat will help you—for a sometimes-substantial fee—nail down the username ofyour choice, assuming it isn’t already taken, at dozens or even hundreds ofsites.
另一方麪，十幾個甚至上百個網站都推出了新的服務，旨在幫用戶綁定他們所選擇的，假定還未被注冊的用戶名，同時收取一定的費用。

The 2007 World Series between the Boston Red Sox and Colorado Rockies should lay to rest one of the great myths of modern baseball: that a dominant "closer"--a high-priced pitching ace who enters a game in the final inning to nail down a victory--is a must-have for success.
FORBES: Magazine Article
By that I mean first nail down the core 4-5 keywords you know are critical and then branch out for more related terms or phrases.
FORBES: Do You Know Your 10 Most Important Keywords?
Most will work with you--and you want to nail this down before you burn through your savings.
FORBES: Deciphering A Credit Report

If you nail down something unknown or uncertain, you find out exactly what it is.
If you nail down an agreement, you manage to reach a firm agreement with a definite result.