mount the white feather

例句：

1. 1. The mountain was too steep for me to climb.
   这座山太陡了，我爬不上去。
2. 2. She mounted the horse and rode away.
   她骑上马跑了。
3. 3. The astronaut mounted the spacecraft and took off.
   宇航员登上宇宙飞船并起飞了。