do while短语²⁹⁵²⁸ 基本例句 计循环当语句 For the past two hours, they've discussed how to resolve any negative emotion in space. The lecture closes with a series of physical exercises they can do while strapped into their space chair. 他们讨论了2个小时该如何减轻太空旅行中的的负面情绪，在研究了一系列太空椅体能训练的应对后，课程告一段落了。 yeeyan