He sometimes used 9 containers of writing fluid a day to keep such detailed records.

VOA: special.2009.01.24

They run from nine in the morning through four in the afternoon with multiple sections through the middle of the day, which are the most popular sections.

早上有9个课程,到下午有4个课程,而中午也有几个，那些都是很受欢迎的课程。

麻省理工公开课 - 固态化学导论课程节选

I used to stay at home and listen to music for 8, 9, 10 hours a day,

我过去会待在家里听音乐，每天听8、9、10个小时。

I was实战 - SpeakingMax英语口语达人

You can take one late day on one piece set, 9 late days on one piece set.

在这个学期中这些，自由的时间都归你安排。

哈佛公开课 - 计算机科学课程节选

So I'm in class a lot of the day from about like 9 to 6,

所以我一天有很多时间在上课，大概从早晨九点到下午六点，

和戏剧专业的朋友 - SpeakingMax英语口语达人