对受约束的两体问题在其自由方向上引入折合质量，并由此导出了受约束两体问题中质点的折合动能，同时也给出了处理受约束两体问题的一种简便方法。
The reduced kinetic energy is discussed using the reduced mass of the constrained two bodies. Then a simple method to solve the constrained two bodies problem is presented.
对受约束的两体问题在其自由方向上引入折合质量，并由此导出了受约束两体问题中质点的折合动能，同时也给出了处理受约束两体问题的一种简便方法。
The reduced kinetic energy is discussed using the reduced mass of the constrained two bodies. Then a simple method to solve the constrained two bodies problem is presented.
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