在每一年的春分点上，太阳横跨着地球上的赤道，使得地球上大部分地区的白天和夜晚的时间接近相等。

At each equinox, the sun crosses the Earth's equator, making night and day of approximately equal length on most of the planet.

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记住，当写的是近似值时，两边并不完全相等，但如果取很小的变化时，那么，最终两边的值将越来越接近。

Remember when we write approximately equal that means it is not quite the same, but if we take smaller variations then actually we will end up with values that are closer and closer.

youdao

但是我们承认，这些数据过于有限以至不能确定这个数字接近于供求相等时的均衡价格——它们可能过于高或过于低。

We recognize, however, that the data are too limited to be confident that these Numbers would be close to equilibrium prices that equate supply and demand-they may be too high or too low.

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