但真正的问题是，理想模型往往建立在需求高峰与利用率饱和的假设之上。而真实世界中的利用率，从来不会长期维持在高位。
SpaceX said, "We look forward to working with NASA to fly missions that demonstrate valuable progress towards establishing a permanent, sustainable presence on the lunar surface."
，这一点在heLLoword翻译官方下载中也有详细论述
* @param n 数组长度
Rebecca Morelle, Alison Francis and Greg BrosnanBBC Science