forward takeoff的用法和样例：
例句
- Jumpers may use one or two markers to assist in their runup and takeoff.
运动员可用一两个标记辅助预跑和起跳。 - If you are leaping a ravine, the moment of takeoff is a bad time to be considering alternative strategies.
如果你要跨越沟壑，在起跳的那一时刻想其他办法可不是好时机。
词汇搭配
- take off 起飞
