1·Here, the shuttle is mounted on a mobile launchpad weeks before its liftoff.
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。
2·One of these valves - which maintain tank pressure during liftoff - broke during the last shuttle launch in November.
其中一个用于在发射时保持燃料箱压力的阀门，在11月的发射前破裂。
3·The insulating foam prevents ice from forming on the tank when it is filled with 500,000 gallons (1.9 million liters) of supercold liquid hydrogen and liquid oxygen before liftoff.
为什么会脱落呢？ 在航天飞机被发射出去之前，它的外部燃料箱里会装满50万加仑（合190万公升）的极冷液态氢和液态氧。
4·It weighed 6.5 million pounds (3 million kg) fully fueled at liftoff.
它在装满发射燃料时重达650万英镑(300万公斤)。
5·For an Aug. 5 liftoff, the launch window opens at 8:34 a.m. PDT 11:34 a.m.
对于5号的发射而言，发射窗口在太平洋时间8点34分开始，一直到9点43分结束。