HSK 7-9
倒计时
dàojìshí动
to count down; countdown
距离发射只剩十秒倒计时。
Jù lí fā shè zhǐ shèng shí miǎo dào jì shí.
Only ten seconds remain in the countdown to launch.
Say it
Hold the button, say it, then let go.
Other HSK words sharing a character
Also free:
Appears across levels (7-9) in the HSK 3.0 word list.