Most known extrasolar planets reside in highly elongated, not circular, orbits.
大多数已知的太阳系外行星都居住在高度拉长而非圆形的轨道上。
When Venus begins to cross the Sun's disc, it looks smeared not circular—which makes it difficult to establish timings.
当金星开始穿过太阳的圆盘时,它看起来有斑点,不是圆形的——这使得确定时间变得困难。
Time is not circular but linear.
时间不是循环的而是直线的。
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