So in experiment we should measure the length of single pendulum, then get the period of oscillation in this condition.
在实验中就要测定单摆的摆长，然后测定此摆长时的振动周期。
Using the single pendulum, we can research the relationship between the period of oscillation of it and the length of it and measure local acceleration of gravity.
通过单摆装置可以方便地研究单摆的振动周期与摆长关系和测定当地的重力加速度。
The second, most of the previous works cannot satisfy the interactive, realizing and real-time request at the same time even though in the single pendulum assumption.
第二，即使在基于单摆模型的情况下，可交互性，实时性和真实感三者在树的动画生成系统很难被同时满足。
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