penumbral lunar eclipse

例句：

1. 1. The penumbral lunar eclipse was visible from the city center.
   从市中心可以看到月偏食。
2. 2.This is the first time I have witnessed a penumbral lunar eclipse.
   这是我第一次目睹月偏食。
3. 3.Penumbral lunar eclipses are rare and can only be observed during certain times of the year.
   月偏食很少见，只能在特定年份的特定时间观察到。