armstand double somersault

例句：

1. 1. She sat in the armchair by the window.
   她坐在窗边的扶手椅上。
2. 2. The armchair was too small for her to sit on comfortably.
   这个扶手椅太小，她坐不舒服。
3. 3. He sat in the armchair and read a book.
   他坐在扶手椅上看书。