Sometime after you've eaten, say you had this Snickers bar at lunchtime and you don't have time to get anything else to eat during the day, your blood glucose level will go down.

有时候你们吃完饭以后,午饭的时候你吃了士力架,在这一天当中你又没时间吃别的东西,你的血糖水平就会下降

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it's mostly used by people who will come in their lunch hour and just sit there and have lunch,

大多是一些人在午饭时间过来的，只是坐在那里吃顿饭，

在布莱恩公园 - SpeakingMax英语口语达人