长期摄动

secular perturbation的用法和样例：

例句

Because of the perturbation, Mars experiences some torque.因为有微扰，火星就受到一些转矩的作用。
The equations defining the zero-order perturbation simply govern the static solution.定义零级微扰的方程简单地决定了静态解。

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学英语单词

0517

acceptance of service

anisotropic coupling constant

apparent photored magnitude