possessives
常考释义
The IAU also adopted three-letter abbreviations for all the constellations and their possessives, Vega thus becoming Alpha Lyr.
国际天文学联合会对所有星座名和他们的属格采用三个字母的缩写。因此,织女星变成了天琴座。
Possessives are often used in expressions of time.
在时间的表述中,经常用所有格。
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