stationary
/ˈsteɪʃənərɪ/adjective
1- not moving or not intended to be moved不动的, 静止的; 稳定的, 不可移动的：
a car collided with a stationary vehicle.
一辆小汽车与一辆停放的车辆相撞。
1.1
- Astronomy (of a planet) having no apparent motion in longitude【天文】（行星）经度无明显移动的。
1.2
- not changing in quantity or condition（数量, 状况）稳定的, 不变的：
a stationary population.
数目稳定的人口。
USAGE
The words stationary and stationery are often confused. Stationary is an adjective which means 'not moving or not intended to be moved', as in a car collided with a stationary vehicle, whereas stationery is a noun which means 'writing and other office materials', as in I wrote to my father on the hotel stationery.
词源
late Middle English: from Latin stationarius （originally in the sense 'belonging to a military station'）, from statio（n-） 'standing' （see STATION）.