Because they were bipedal, their arms were free to evolve flapping flight, which cannot be said for other reptiles of their time.
因为它们是两足动物，它们的手臂可以自由地进化出拍打的翅膀，这在当时的爬行动物中是不可能的。
Through a large number of computer digital simulation experiments, this paper discusses the shift time of free flight and little single impulse individually.
本文通过大量的计算机数字仿真实验，研究了无冲量自由飞行轨迹与单个小冲量飞行轨迹的转移时间。
Ensuring taxi conflict free and taking account of single flight taxi time, total taxi time of inbound and outbound flights was reduced.
在保证滑行道零冲突、兼顾单个航班滑行时间的前提下，缩小机场进出港航班总滑行时间。
Ensuring taxi conflict free and taking account of single flight taxi time, total taxi time of inbound and outbound flights was reduced.
在保证滑行道零冲突、兼顾单个航班滑行时间的前提下，缩小机场进出港航班总滑行时间。
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