Mr.：There are two things that you'll need to know.
有两件事你必须知道。
M：What are they?
哪两件事?
Mr.：The school has three lunch periods, and the kids are divided into three groups to go to lunch.
学校有三个午休用餐时间，学生分成三组去吃午餐。
M：Wow!
哇!
Mr.：Furthermore, when you are dismissed in the afternoon, you will be divided into two waves.
此外，下午放学时，学生也分成两批。
M：Two waves?
两批?
Mr.：The school parking lot is not big enough for all the school buses to come in at one time. So only half the buses come in first to pick up the first wave's students.
学校停车场不够大，不能在同一个时间让所有的校车进来。所以一半的校车先进来搭载第一批的学生。
M：And the other half come in later to pick up the second wave.
而另一半的校车再进来搭载第二批。
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