alien word

例句：

1. 1. The astronauts were surprised to find an alien planet in their solar system.
   宇航员们惊讶地发现他们的太阳系中有一颗外星行星。
2. 2.She was an alien to her family, who didn't understand her accent.
   她对家人来说是个外星人，因为他们听不懂她的口音。
3. 3. The alien spacecraft landed safely on the moon.
   那艘外星飞船安全着陆在月球上。