It was only at two points in the year that the night and the day were of equal length and that was at the spring or fall equinox.
一年之中只有两次，白天和夜晚的长度一样，即春分和秋分。
Day and night would each be exactly 12 hours long on a spring or fall equinox only if the sun were a single point of light and Earth had no atmosphere.
如果想要昼夜在春秋分日达到精确地12小时等长，除非太阳是个单点光源或者地球上没有大气层。
Farmers are even returning to fall tillage and in the spring may go over the soil being prepared for corn with two or more cultivations before planting.
农民甚至又回到以前秋天耕耘，春天查看已耕种过两三次的土壤，以备种植玉米。
Winter, spring, summer, or fall, the Limelight Hotel is the perfect base for your Colorado adventure.
冬天，春天，夏天，或秋天，风头酒店是您科罗拉多冒险的最佳基地。
NASA says that more geomagnetic storms occur in the fall and spring, and this is a great time for viewing the aurora borealis or australis (if you're lucky enough to be in an area where it's visible!)
NASA宣称更多的地磁暴发生在春秋两季，在这段时间内，是观察北极光或南极光的绝佳时机(如果你足够幸运的处于一个能够观察到它们的地区！)
If the fall or spring time changes cause sleep disruptions that last longer than a few weeks, visit your doctor.
如果秋季或春季时制改变给你带来超过数周睡眠障碍，就应当去看医生。
Project analysis sessions offer a two-hour "over-the-shoulder" look at your project at ULI's Spring Council Forum or Fall Meeting.
项目分析会议是在UL I春季理事会论坛或秋季会议上提供两小时来近距离交流您的项目。
There were no clear differences in density or distribution of the macrobenthos between spring and fall.
春秋季生物量及栖息密度等值线分布趋势无明显变化。
Every piece is decorated with seasonal motifs, such as a tiger among maple leaves for fall or cherry blossoms for spring.
而每件产品都于不同季节有不同的设计主题，像春天会有樱花而秋季就有老虎和枫叶等。
Never underestimate the power of some fresh air - especially in the fall or early spring when you could describe the temperature as being "crisp."
永远不要小觑新鲜空气的能量，特别是秋天以及早春，你会把温度形容成“清新的”。
It goes perfectly with a dark suit in fall or winter and with jeans or cords in spring.
因为它和深色的整装在秋冬季是绝配，而在春天的时候和牛仔或灯芯绒面料的衣服也是完美搭档哦。
The green of spring and summer turns to red and gold in fall or autumn and then to snowy white in winter.
春天和夏天的绿色在秋天变成红色和金色，然后在冬天又变成雪白。
The green of spring and summer turns to red and gold in fall or autumn and then to snowy white in winter.
春天和夏天的绿色在秋天变成红色和金色，然后在冬天又变成雪白。
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