花千骨之学霸千金:请教 first quarter 的详细解释

我们把一年分四季，美国人称每个季度为一个quarter

first quarter 就是第一季度

One-half of the moon appears illuminated by direct sunlight while the illuminated part is increasing. (For the purposes of the predictions provided here, the percent (%) moon illuminated would be close to 50% and increasing.)
www.saltwatertides.com/misc.dir/definitions.html

The upper half of the hoist and the place of honour in a flag; also called the canton and sometimes the upper hoist. The three other quarters are the second quarter - the upper half of the fly; third quarter - the lower half of the hoist (also called the lower hoist); and the fourth quarter - the lower half of the fly.
www.mch.govt.nz/nzflag/glossary.htm

In opposition with the Sun; rises at noon and sets at midnight; 50 percent illuminated, 90 degrees east elongation.
www.ccastronomy.org/terminology.htm

Half of the Moon's disc is illuminated. The fraction of the Moon that is illuminated is increasing.
weather.iplbath.com/weatherstation/A4_explain.aspx

the first fourth of the moon's period of revolution around the Earth
wordnet.princeton.edu/perl/webwn

1/4

spring