Making a formal presentation 正式演讲 Looking at a subject in more detail 细说主题
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Starting a product presentation 推介产品 Product Range 系列产品
Receiving a visitor to your office 接待来宾 The visit 参观访问
Hiring a car 临时出租 Request 要求出租
Ordering a taxi 预订出租 Say when 告诉对方用车时间