blue moon
短语n. 不可能或稀有的时期或事情
发音
AU
词形变化
blue moons
复数
blue moons
释义与例句
n.
-
1.
An extra full moon that appears in a subdivision of a year, namely:
The third full moon in a season that contains four rather than the usual three full moons.
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2.
An extra full moon that appears in a subdivision of a year, namely:
The second of two full moons that occur in the same calendar month (a definition created by mistake in the 20th century).
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3.
The moon tinted towards blue as it appears in the sky, caused by dust or smoke in the atmosphere.
可数 罕用 不可数 -
4.
A long time.
可数 习语 引申义 不可数 -
5.
A bright blue, sweet-flavored ice cream that is popular in the Midwestern U.S. and is a component of Superman ice cream.
不可数 可数