In this paper the psychological analysis is made of the modern advanced oblique run-up skill by means of documentation, observation and practice.
本文通过文献法、观察法、实践法，对现代先进的斜线助跑技术动作进行了心理学分析。
A creature must balance perfecting a skill or trait (building up legs to run faster) against experimenting with new traits (wings).
生物必须在完善现有技能、特质(练腿力以便跑得更快)与尝试新特质(翅膀)之间作取舍。
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