semi-major axis

常見例句

The square of the orbital period of a planet is directly proportional to the cube of the semi-major axis of its orbit.
第三定律（周期定律）：各個行星繞太陽公轉周期的平方和它們的橢圓軌道的半長軸的立方成正比。
In order to guarantee the characteristics of frozen orbit, in-plane orbit control needs to adjust the semi-major axis, eccentricity, argument of perigee simultaneously.
為了保證凍結軌道的凍結特性，平面內軌道控制需要對半長軸、偏心率和近地點幅角都控制。
When the planetary migration occurs under the tidally interaction of a planet and a disk of gas or a planetesimal, the orbital parameters, especially, semi-major axis, of this planet will be altered.
行星遷移發(fā)生在行星與氣體或星子的星盤之間進行潮汐相互作用時，這造成行星軌道參數(shù)，特別是半主軸的變更。