ph.

1. We have to pay on the nail before we can leave with the goods.
    我们必须当场付款，才能拿走货物。

1. 立即;当场;在讨论中：nail up 把...钉牢;把(门)钉死 . | on the nail 立即;当场;在讨论中 . | by name 名叫;用名字 .

2. 立即：on the level 老实;忠诚 | on the nail 立即 | on the nose 准确地

3. 立刻：on the move 在活动中 | on the nail 立刻 | on the neck of 紧跟在后面

4. 立即;当场;在会商中：nail up把...钉牢;把(门)钉死 | on the nail立即;当场;在会商中 | by name名叫;用名字