您要查找的是不是：
- long period variable star 长周期变星
- He was on his feet again after such a long period in hospital. 住院很长一段时间他复原了。
- long period variable 长周期变星
- After a long period of rain the river may overflow its banks. 在一个长时间的降雨之后，河水会漫过河岸。
- Intermediate polars are a type of cataclysmic variable star system. 中度的极化双星系统是激变星中的一种类型。
- Algol is probably the most famous variable star in all the heavens. 大陵五可能是天空中最著名的变星了。
- There is a long period when we have no news of him. 有很长一段时间我们没有得到他的消息。
- Some waste rots away over a long period of time. 有些食物要经过好长时间才会腐烂。
- Fifteen years is a long period of her life . 五十年是她一生中很长的一段。
- Long period hard work pulled him down a lot. 长期的艰苦劳动使他的身体虚弱了许多。
- China had a very long period of feudalism. 中国有很长的封建时期。
- To take back and eat for a long period of time. 带回去慢慢吃。
- See if you can persist over a long period. 看看你能坚持多长时间。
- Welcome to the American Association of Variable Star Observers (AAVSO) Nova Search program. 欢迎访问美国变星协会新星搜索组。
- Aeon: An indefinitely long period of time; an age. 极长的时期;永世。
- A giant,red,double and variable star,the brightest in the constellation Scorpio,about 424 light-years from Earth. 一颗巨大的，可变化的红色双星，是天蝎座最亮的星，距地球约424光年
- What do you find over a long period of time? 长时间过后,您有什么发现吗?
- A bright - red intrinsic variable star, 527light - years from Earth, in the constellation Orion. 参宿四位于猎户星座的一颗鲜红色固有变星，距地球572光年
- Fifteen years is a long period of her life. 五十年是她一生中很长的一段。
- Britain was a Roman dependency for a long period. 英国有很长一段时间是罗马的属地。
