卫星是对航天飞机发展的阻碍。
严格的解雇条例反而会影响生产率的增长，阻碍社会的繁荣发展和整体福利。
Stringent job dismissal regulations adversely affect productivity growth and hamper both prosperity and overall well-being.
限制那些有足够天赋、即使睡眠少于平均值却能很好地工作和娱乐的人会阻碍我们的发展，这将是一件憾事，如果这确实对他们没有害处的话。
It would be a pity to retard our development by holding back those people who are gifted enough to work and play well with less than the average amount of sleep, if indeed it does them no harm.
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