1.the vanguard of ……的先锋/先头部队
Hedge funds, always the most mobile of firms, are likely to be in the vanguard of any exodus.
对冲基金，通常是公司中最具流动性的基金，可能成为外撤的先头部队Shq8&v]|5If*+8S6vnB。

2.on the ground 实地；在当地的
Our commanders on the ground are constantly adjusting their approach to stay ahead of the enemy, particularly in Baghdad.
我们前线的指挥官不断调整作战方案，来保持对敌优势，尤其是在巴格达ZEM~C,0De2u。

3.sound obvious 听起来平淡无奇
It may sound obvious, but if you continue to bring bad foods into your home, you will continue to eat them.
这个办法可能听起来平淡无奇，但如果你继续把垃圾食品带回家，你就会继续吃jV-68&3buh.opRtU-^@。

4.be eager to 渴望；急于
The child is eager to see his mother.
小孩急着想见妈妈puA@tKlHMQt^so[za。