基本解释adj.(贝壳)三瓣的同根派生 英汉例句Pozzi's abdominal trivalve retractor 波济(氏)三翼腹壁牵开器Mayo's abdominal trivalve retractor 梅欧(氏)三翼腹壁牵开器Keywords perpherally inserted central catheter;cost;practicability;trivalve; 经外周置入中心静脉导管;费用;实用性;三向瓣膜;