trampoline

The children spent all afternoon jumping on the trampoline in the backyard.

(Chinese) 孩子们整个下午都在后院的蹦床上蹦跳。

Professional gymnasts use a trampoline to practice complex mid-air flips.

(Chinese) 专业体操运动员使用蹦床来练习复杂的空中翻滚。