"Arrive at school on time" 是按时到校的英文表达方式。这个短语的来源可能源于人们通常在某个具体的时间（比如上午8点）到达学校，所以用"on time"来表示"按时"。

例句：

It's important to arrive at school on time. (重要的是按时到校。)

I always try to arrive at school on time, but sometimes traffic gets in the way. (我总是尽量按时到校，但有时交通会妨碍我。)

Arriving at school on time is a sign of respect for your teachers and classmates. (按时到校是对你的老师和同学表示尊重的一种方式。)