| 释义 |
countdown
\ˈ ̷ ̷| ̷ ̷\ noun
(-s)
Etymology: count down, v.
: an audible backward counting off in fixed units (as seconds) from an arbitrary starting number (as 10) to mark the diminishing time remaining before the execution of an operation
< the countdown concluded, “four, three, two, one,” and then the firing button was pushed >
also : the length of time marked by such a counting or required by the entire sequence of steps in readying a missile for flight — compare zero hour |