他是十点钟左右到的。

He arrived (at) about ten.

《牛津词典》

警察局的调度员在早上十点半左右接到电话。

The police dispatcher received the call at around 10:30 a.m.

《柯林斯英汉双解大词典》

但是动物园里的长颈鹿在4点左右睡觉。

But the giraffe in the zoo sleeps around 4.

youdao

For those of you who don't realize it, it's now about 12:00 in the evening tomorrow in Beijing Yeah, so anyway, I'll probably fall asleep by about 10:30.

对那些没有注意到的人，请于明晚12点左右联系我,不管怎么说，我会在10点半左右睡觉。

麻省理工公开课 - 固态化学导论课程节选