重點講解：
1. switch over
轉換；改變；轉變；
eg. As the new semester has begun, we must switch over to our studies.
新學期已經開始，我們應當把注意力轉移到學業上來。
eg. The chairman decided to switch the factory over to bicycle production.
董事長決定使該廠改產自行車。
2. how about
（用于提出建議或邀請）怎么樣好嗎；
eg. You want Jeannie to make the appointment for you? How about the end of next week?
你想讓珍妮幫你預約嗎？下周末怎么樣？
eg. How about a cup of coffee at a nearby coffee shop?
去附近的咖啡屋喝杯咖啡吧？
3. dim sum
點心；
eg. I am interested in making Chinese dim sum, cakes and bread.
我的興趣是做中式點心、蛋糕和面包。
eg. If you can top Matt, I'll treat you to dim sum on Sunday.
如果你能勝過麥特，星期天我就請你吃點心。