Jack ：
Can you be here by six?
你六点以前能到吗？
Mary：
Normally I could, but the thing is I have a doctor's appointment at 4:30, so that would be pushing it.
本来可以，不过因为四点半约好了见医生，恐怕要推迟些。
Jack ：
How about 6:30 then?
六点半如何？
Mary：
O.K. It's a date.
好的，说定了。
对话讲解：
appointment n. 约定（会面时间或地点）
I made an appointment to see the doctor.
我约定好时间去看医生。
push v.推迟
The meeting must be pushed because of heavy rain.
因为大雨会议必须推迟。