感觉天然蚕茧球已经充满了水分并变得柔软以后，就可以使用了。
Natural feeling of the ball cocoon has been full of water and become soft, can be used.
一些人说做瑜伽能通过让他们的脊柱变得柔软并拉伸背部肌肉以达到缓解背部的疼痛的目的。
Some claim that it eases back pain by keeping their spines supple and strengthening the muscles that support it.
一种放在或垫在地板上的铺设物下面的垫子，使变得柔软并增加耐久性。
A mat placed or attached beneath carpeting to provide softness and increase durability.
应用推荐