day length 白昼长 ; 白昼长度 ; 日长 ; [天] 昼长
Length of day 日长 ; [天] 日照长度 ; 日长变化
perception of day length 日长的感应
critical day-length [植] 临界昼长
day-length treatment 日照处理
definite day-length plant 定日长性植物
Length of the Day 日长变化
critical day length [植] 临界日长 ; 临界昼长
fluctuation in length of day 日长波动
day-night length 昼夜长短
The Egyptians probably measured their day in twenty-four hours of unequal length.
埃及人很可能用不同长度的24小时来计量他们的一天。
Spring starts when the day and night are the same length.
当白天和黑夜一样长时，春天就开始了。
In order to track temporal hours during the day, inventors created sundials, which indicate time by the length or direction of the sun's shadow.
为了在白天追踪时间，发明家发明了日晷，它通过太阳阴影的长度或方向来指示时间。
That's an excellent question, especially looking into factors that affect the return-generating process in the stock market-in other words, factors that affect the stock prices in a conventional sense: Market liquidity, length of the daily fasting period, especially contrasting summer months with winter months when Ramadan coincides with one versus the other, with the length of day being really longer during summer months.
VOA: standard.2010.08.05
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