1、The changes of optimal trajectory caused by Earth's oblateness are computed.
詳細計算分析了地球扁率對最優(yōu)軌道的影響。

2、Determining the oblateness is extremely difficult.
測量扁率是極為困難的。

3、Titan's oblateness may also help explain why its methane lakes are concentrated near the poles.
泰坦的扁圓形也可以幫助解釋為什么它的甲烷湖集中在極地附近。