Notice: a formal letter or statement saying that you will or must leave your job or house at the end of a particular period of time 辞职信;搬迁通知
He has handed in his notice. 他递交了辞呈.
They gave her two weeks'notice. 他们通知她两周后搬走.

Think over: 仔细考虑
I'll think over your suggestion again. 我将再次仔细考虑你的建议.

Expertise: expert knowledge or skill in a particular subject, activity or job 专门知识;专门技能;专长
professional/scientific/technical expertise 专业／科学／技术知识
They have considerable expertise in dealing with oil spills. 他们在解决溢油问题方面非常在行.
We have the expertise to help you run your business. 我们有帮助你经营自己业务的专门知识.
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