Knowing where a point on the Earth is with respect to the sun, at any date and time.
知道地球上任意时间，任意地点。某一点相对太阳的位置。
He found that under these circumstances, the birds oriented with respect to the new "Sun".
他发现在这类情况下，鸟类就会朝向新的“太阳”。
Another key purpose that our moon serves is that its gravitational force stabilizes earths axis with respect to earths plane of orbit around the sun.
月球也有另一个主要功用：它的引力使地球的轴心跟地球绕太阳运行的轨道平面保持一定的倾斜度。
The position of a rainbow in the sky is always in the opposite direction of the Sun with respect to the observer, and the interior is always slightly brighter than the exterior.
的立场彩虹天空中总是在相反方向的太阳与尊重观察员，以及内部总是稍微亮度比外表。
The position of a rainbow in the sky is always in the opposite direction of the Sun with respect to the observer, and the interior is always slightly brighter than the exterior.
的立场彩虹天空中总是在相反方向的太阳与尊重观察员，以及内部总是稍微亮度比外表。
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