Definition
Used to indicate that the current topic of conversation is about a particular person or thing.
說起，談起
Talking of the weather, it's absolutely beautiful today.
說到天氣，今天真是美極了。
Talking of the new manager, what do you think of him?
說到新經理，你覺得他怎麼樣？
Talking of vacations, we are planning a trip to Europe this summer.
說到假期，我們計劃今年夏天去歐洲旅行。