on time, on schedule,on the stroke 都能表达按时，on time 释义 at the expected time, on schedule 释义 according to schedule or without delay, on the stroke 释义 exactly the time without delay例句如下1. She always pays her bills on time. 她总是按时支付账单。

2. Whatever difficult we meet, we shall finish the work on schedule.无论我们遇到什么苦难，我们都要按时完成工作。

3. On the stroke of 12，fireworks suddenly exploded into the night.12点的钟声敲响时，焰火突然冲破了夜空。