Traffic reaches its peak between 8 and 9 in the morning.
上午8、9点钟之间是交通高峰期。
《牛津词典》
2
Often, they are on a bus or in class during the peakmorning hours.
通常在上午的繁忙时段,他们不是在去学校的车上,就是坐在教室里。
3
He writes only in the morning, when his focus is at its peak, and then spends the afternoons working on interesting projects - typically things that require the use of his hands.