名词
中文翻译：适当的运动
同义词：
['proper motion', 'proper motions例句：1. The planetary system is characterized by its proper motion.（这个行星系统以其适当的运动特征而闻名。）']
例句：
-
1. The planetary system is characterized by its proper motion.
这个行星系统以其适当的运动特征而闻名。
-
2.Proper motion measurements are crucial for understanding the universe's structure.
适当的运动测量对于理解宇宙的结构至关重要。
-
3. The star's proper motion indicates that it is moving away from us at a steady pace.
这颗星的适当运动表明它正以稳定的速率远离我们。