单词
light-year
读音
ˈlaɪt jɪr
美式
英式
词根
无
释义
n. 光年；很长时间
例句
It spans about 3,000 light-years in diameter, compared to the Milky Way's 100,000 light-year diameter.
它的直径大约为3000光年，而银河系的直径有100000光年。
This image was produced by combining a dozen Chandra observations made of a 130-light-year region in the center of the Milky Way.
这张照片是多张钱德拉天文台的照片合成的，显示的是130光年远的银河系的中心部分。
By 2011 debris in the center of the ring, which is about a light-year in diameter, was blazing more intensely as the supernova entered a new stage of stellar demise.
到2011年为止，因为这个超新星进入了星球消亡的新阶段，所以这环物质中心直径大约是一光年的碎片燃烧的更加强烈了。
It spans about 3,000 light-years in diameter, compared to the Milky Way's 100,000 light-year diameter.
它的直径大约为3000光年，而银河系的直径有100000光年。
This image was produced by combining a dozen Chandra observations made of a 130-light-year region in the center of the Milky Way.
这张照片是多张钱德拉天文台的照片合成的，显示的是130光年远的银河系的中心部分。
By 2011 debris in the center of the ring, which is about a light-year in diameter, was blazing more intensely as the supernova entered a new stage of stellar demise.
到2011年为止，因为这个超新星进入了星球消亡的新阶段，所以这环物质中心直径大约是一光年的碎片燃烧的更加强烈了。
强化记忆
无
看视频学发音
Terra will send a pulse of light from Earth towards Stella’s spaceship.Since light takes a year to travel one light-year,its path will be a 45-degree diagonal line.
to comets and asteroids that may existalmost a light year from our sun.And as we increase the detail of this picture,
the twins wonder what will happen when they’re reunited.Since a light year is exactly the distance light can travel in a year,Stella’s journey should take 23 years.
For the rest of Stella's return home,Terra receives multiple light bursts each year.Thus, Terra observes Stella aging slowly for about 90% of their 23 years apart,
所属分类
出国,其他
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