combination hub接插座combinationn.结合；结合到一起的事物或人；密码combination of reservoir and seal储盖组合combination buffer and draft gear缓冲车钩combination learning with working工学结合combination working with learning工学结合combination of significance tests显著性检验组合combination in restraint of trade贸易限制中的联合combination chrominance amplifier组合色度放大器combination of spores and pollens孢粉组合Combination of practice and study工学结合combination of dynamic and static动静结合