"For every job that's created by the space program, there are jobs that are affected by that.

VOA: standard.2010.03.18

And for the space of four hours every night, I feel no boredom.

每晚四小时的学习，我一点也不觉得无聊。

耶鲁公开课 - 政治哲学导论课程节选

As with every float, each square centimeter of space must be covered with flowers or other organic material, including moss,seeds, bark and plant fiber.

VOA: standard.2009.12.30