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bring new blood into
has been in a black mood for days
tighten your belt
his career is in the balance 未知的，不可预测的
her face rings a bell 看起来或听上去很熟悉
get to the bottom of sth. 弄清真相
pay a call 拜访
work round the clock 夜以继日
If the traffic is jamed, the only thing to do is to keep your cool, or get out of the car and walk. 保持冷静
keep her name in the dark 隐瞒
get out of hand 失去控制
learn by heart 牢记
the dark horse 黑马
the bottom line 本质内容
have a mind to 想做某事，计划做某事
over the moon about 欣喜若狂
be in the mood to do sth.
get the picture 了解某事
our vacation plans are on hold right now 尚未办理的事情

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哇 原来是个 笔记贴

Artificial Intelligence

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