As far as anyone knows
To the limits of anyone’s knowledge
据目前所知（但不确定）
- The party is at Sarah's house as far as I know.
据我所知，聚会在萨拉家举行。
Can’t make heads or tails of
Failing to understand or confused about something
无法理解，搞不懂
- I can't make heads or tail of these instructions on the packet.
我搞不懂包装上的说明。
Doing one's homework
A large collection of a particular of thing
认真研究；仔细准备
- It was obvious that she had done her homework and thoroughly prepared for her interview.
很显然她为面试做足了功课，准备很充分。
Know something backwards and forwards
To be an expert or intimately familiar with something
熟谙；对……了如指掌
- She knows her part in the play backwards and forwards.
她熟谙自己在剧中的角色。
Knowledge is power
The more someone knows, the more equipped that person is
知识就是力量
- Knowledge is power and health is wealth.
知识是力量和健康是财富。
Pick one's brain
To obtain ideas or information from someone
请教（某人）
- I was picking Simon's brains about which computer to buy.
我正请教西蒙该买哪种电脑。
Pull an all-nighter
Used by students to indicate late night/all night studies
（尤指考试前的）通宵学习
- I pulled an all-nighter last night.
我昨天熬了个通宵学习。
To the best of your knowledge
As far as you know
据我所知
- To the best of my knowledge, the chemicals which were found are not dangerous.
据我所知，那些被发现的化学品没有危险性。
Under one’s belt
Safely or satisfactorily achieved, experiences, or acquired
已经掌握…；已经获得…
- Basic computer skills are a good thing to have under your belt.
掌握基本的电脑使用技巧对你有好处。
