The shuttle may sit on the launch pad for weeks.

航天飞机在发射台上有可能要待上几星期。

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The rocket is on the launch pad, but is not ready to be launched yet.

火箭已在发射台上，但尚未做好发射的准备。

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What's the best way to whisk astronauts to safety if their rocket were to explode on the launch pad?

如果航天员乘坐的火箭即将在发射台上爆炸，那最好的逃生方式是什么？

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The first launch attempt was postponed after technicians discovered a hydrogen leak while the ship was on the launch pad.

VOA: standard.2009.06.16

Engineers discovered the problem during fueling, and worried that any excess hydrogen on the launch pad could cause an explosion during engine ignition.

VOA: standard.2009.03.15

Shuttle test director Stephen Payne said the lunar mission team agreed to allow Endeavour to take the launch pad,or range, on Wednesday.

VOA: standard.2009.06.16

We listened to emotionally-charged accounts of a desperate and frustrating attempt to keep Challenger on the launch pad.

NPR: Challenger: Reporting a Disaster's Cold, Hard Facts

Shuttles often are rained on while sitting on the launch pad in Florida, but waterproofing protects the tiles.

CNN: Technicians finish toasting shuttle tiles

He compared it to the Apollo 11 blaze that killed three astronauts on the launch pad in 1967.

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