1. To keep one’s eye on (or to take one’s eye off) the ball –  to keep one’s focus on a particular matter
1. To keep one’s eye on or to take one’s eye off the ball—把重点放在特定的事上
Ex: “In this business if you want to be successful, you need to keep your eye on the ball”。
例句：如果你想在这份生意上成功，你需要集中注意力。

2. To know the score – to know the essential facts of the situation
2. To know the score—了解重要的事实和情况
EX: “I was going to bring Jane up to date with the situation but she already knows the score”。

例句：“我本来要告诉简最新的情况，但是她已经知道了。”
3. A game changer – an event or procedure that could have a dramatic effect on the current policy or thinking
3. A game changer—能对目前的政策或者是想法产生重大影响的事或者步骤
Ex: This new contract with The States could be a real game changer for our business。
例句：和美国的新合同对我们的生意来说扭转了局面。

4. To blow the whistle on someone – to expose an illegal activity and the person(s) responsible within an organisation
4. To blow the whistle on someone—揭露组织内某人的不法行为
Ex: “She was fed up with the way things were going and decided to blow the whistle on the company’s illegal activities”
例句：“她受够了所有事，决定告发公司的不法行为。”

5. League – a class or category of excellence and quality
5. League—高质量和品质的代表
Ex: “When it comes to showmanship, David is in a league of his own”。
例句：当说到主持能力，大卫独树一帜。

6. To score an own goal – an act that unintentionally harms one’s own interests
6. To score an own goal—乌龙球，无意识地损害自身利益的举动
Ex: “Philip scored an own goal when he quit his job before signing a new contract。”
例句：菲利普在签新合同之前就辞职这种行为就像是踢了个乌龙球。

7. To be on the ball – to be aware and quick to respond to new ideas
7. To be on the ball—能迅速意识到和对新想法做出反应
Ex: “You need to be on the ball in this job”。
例句：你在这份工作上要够机灵。

8. To watch from the sidelines – to be an observer rather than actively involved in a situation。
8. To watch from the sidelines—作为旁观者，而不积极参与
Ex: “Harry never gets involved in anything. He’s always watching from the sidelines。”
例句：哈里从不参与任何事情。他总是站在场外旁观。

9. To move the goalposts – to unfairly move the conditions or rules of procedures during its course
9. To move the goalposts—在进行过程中不公平地改变条件或者规则
Ex: It’s impossible to plan anything in this company if management keeps moving the goalposts。
例句：如果管理层总在更改规则，在公司里什么都不可能实现。