Meaning of zhǔn shí:
zhǔn shí
准时
Adjective
on time; punctual
Wǒmen xūyào zhǔnshí dàodá jīchǎng.
我们需要准时到达机场。
We need to arrive at the airport on time.
Tā měi cì huìyì dōu hěn zhǔnshí.
他每次会议都很准时。
He is punctual for every meeting.
Adverb
on schedule
Huìyì zài xiàwǔ sān diǎn kāishǐ, qǐng dàjiā zhǔn shí dàochǎng.
会议在下午三点开始,请大家准时到场。
The meeting starts at 3 PM, please be on time.

