基本解释n.外壁同根派生 英汉例句In accordance of the phenomenon of many ectotheca desquamations on freezing parts of main shaft in Wugou Mine,the paper analyses the causes and introduces dealing methods. 五沟煤矿主井井筒冻结段外壁多处出现剥裂现象,本文对此进行了原因分析,并介绍了处理方案。