航天飞机发射前的倒计时已经开始。
The countdown has begun for the launch of the space shuttle.
发射前仔细瞄准。
在实验室中对岩石破裂前的声发射前兆和遥感前兆进行了对比研究。
Study on simulation of statistical damage in the full process of rock failure;
原计划的发射在起飞前四分钟被取消。
The original planned launch was called off four minutes before blastoff.
图中是在航天飞机离地前几周，被安放在一个移动发射台上。
Here, the shuttle is mounted on a mobile launchpad weeks before its liftoff.
为了看卫星发射，他早早地就等在电视机前了。
He went early to wait in front of the TV to watch the satellite launch.
为了看卫星发射，他早早地就等在电视机前了。
He went early to wait in front of the TV to watch the satellite launch.
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