The absorbing boundary condition is tackled easily and properly by using sponge layer technique 采用“海绵层”技术，可以有效地处理消波边界问题。
2.
Elatic cotton surface : it does not come in contact with the space cotton to allow body heat to be dissip ated evenly 高弹海绵层：把面料与太空绵隔开，让身体散发的热量更快排走，保持床垫干爽。
