在8月离开地球的凤凰号火星着陆探测器预计在明年5月到达火星(这篇文章写于2007年，故应为2007年8月离开地球，2008年到达火星)，并且NASA计划在2009年发射火星科学实验室。
The Phoenix Mars Lander, which left Earth in August, is expected to reach the Red Planet next May, and NASA plans to launch the Mars Science Lab in 2009.
除非生活所迫，中国人一般是不愿意离开自己的家乡的，这就是人们常说的“故士难离”。
The Chinese are deeply attached to their homes. Unless constrained by livelihood, they are usually reluctant to leave their homes, hence the saying "It is hard to leave one is native land".
一类是投影点处的轨迹走向服从鞍点规律，且由于投影点位于稳定流形与不稳定流形分割的相平面的上部或下部，故轨迹将沿稳定流形方向到达动态鞍点再沿不稳定流形方向离开该点；
One is the saddle-type structure where the projection point is located either in the up part or the down part of the phase plane, which is divided by both stable and unstable manifolds.
一类是投影点处的轨迹走向服从鞍点规律，且由于投影点位于稳定流形与不稳定流形分割的相平面的上部或下部，故轨迹将沿稳定流形方向到达动态鞍点再沿不稳定流形方向离开该点；
One is the saddle-type structure where the projection point is located either in the up part or the down part of the phase plane, which is divided by both stable and unstable manifolds.
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