Not only are bed frames not generally strong enough to withstand being used as trampolines , using your bed for anything other than sleep or sex can exacerbate insomnia .
不但床的结构不足以承受用作蹦床，而且在床上做除睡觉及性爱以外的事情会使你的失眠恶化。
In the end the trampolines should be in an upright position for at least three .
结束时，运动员应保持直立至少3秒。
Some historians believe the first trampoline dates back to the alaskan inuits as early as the mid-1800s ; others suggest that the pioneers are really circus acrobats who have used devices resembling trampolines for at least 200 years .
They conceptualized a bridge for the river seine made up of humungous floating trampolines .
他们为塞纳河构思出一座由巨大浮动蹦床组成的桥。
There are sensory accommodations like noise-cancelling headphones , movement tools like fidgets , ball seats , and mini trampolines , and tinted glasses to reduce glare .
提供给感官便利的设备有降噪耳机，运动器具像可玩弄的小玩具、球座、迷你蹦床、减弱强光的有色眼镜等。
Star climbers and trampolines are excellent for performing aerobic exercise .
