nail sth down

1.（用釘子）將...釘牢，將...固定

2. 達成一致；作出決定

nail sb down

1. 迫使明確保證（或準確說出想做之事）

例句:

Lay strips of 4mm plywood over the mesh and nail these down.(在網子上鋪上4毫米厚的膠合板條，並用釘子釘牢。)

用釘子將…釘牢.

例句:

Lay strips of 4mm plywood over the mesh and nail these down.(在網子上鋪上4毫米厚的膠合板條，並用釘子釘牢。)

to nail sth down.to nail down sth.

弄清；發現,

例句:

There's something odd about him but I can't nail it down.(他有些古怪，但我說不清是什麼。)

Could you nail down the source of this tension?(你能弄清造成這一緊張局勢的原因嗎？)

確定,

例句:

We need witnesses who can nail down the time of the robbery.(我們需要能夠確定搶劫時間的目擊證人。)

確定.

例句:

We need witnesses who can nail down the time of the robbery.(我們需要能夠確定搶劫時間的目擊證人。)

to nail sth down.to nail down sth.

敲定；確定,

例句:

He is trying to nail down a missile-reduction agreement with his Russian counterpart.(他正試圖與俄羅斯的同級官員敲定一項削減導彈的協議。)

敲定；確定.

例句:

He is trying to nail down a missile-reduction agreement with his Russian counterpart.(他正試圖與俄羅斯的同級官員敲定一項削減導彈的協議。)

On the base of the above illustration, the text more nails down the stress of the high school Chinese teaching. 

並在此基礎上探賾索引，進一步明確當前高中語文教學的重點。

The right hand, nails down, is rested on the cantle near the center, or may be held in the air near this position; 

將右手放在鞍尾中心附近的位置上，或懸空放在這附近的位置上；

My nails are too long, I must file them down. 

我的指甲太長了，我必須把它們銼平。

Down below, the workmen had prepared a metal net, which was fixed to the ground with long nails, all around the space where the crane was slowly lowering its load. 

在下面，工人們已經準備好了一個金屬網，用長長的釘子固定在地面上，圍住剷車即將慢慢的卸下負荷的地方。

The rain trickles down through the house, and everything wooden swells and shrinks, and the nails in everything wooden, the floors and baseboards and window casings, the nails inch out and rust. 

雨水滲進房屋，所有木質的傢俱都脹大或是縮小了。 所有木製品裡的釘子，地板，護壁板和窗套裡的釘子也全都生鏽鬆脫了。

"About 1.8 metres down we found a small splinter of wood," Blenkin says. "we dug a little further and found some nails." 

“大約挖下去1.8米處，我們找到了一小片木頭，”布蘭金說，“我們往下挖了一點，又發現了一些釘子。”

My nails are too long, I must file them down. 

我的指甲太長了，必須把它們磨小。