“二体”造句
在
二体假设下, 推导了椭圆轨道上相对运动方程的近似形式.
In the two - body case, the approximate equations of relative motion on elliptic orbits are derived.
研究了真空熔铸法制备的锰白铜基铸造碳化铬复合材料的
二体磨料磨损机理.
The abrasion wear mechanism of Mn copper - nickel alloy matrix - cast chromium carbide composite was studied.