excopy目录与文件复制命令,外部拷贝EXCn.开挖(激励器；排气关闭)Excision therapy割治疗法excising forceps切断钳,牙切断钳excavating order挖土顺序excitability n.易兴奋性；Excluding clauses除外条款excitative system励磁系统Excision of nerve神经切除术excusable neglect可原谅的过失excretory bladder排泄囊excision nuclease切除核酸酶