background : long-bone allograft reconstruction following tumor extirpation be complicated by problems such as nonunion at the host-allograft junction , allograft fracture , or allograft infection .背景:腫瘤切除術后異體骨移植重建可能伴有自體骨與移植物交接處和自體骨骨折,或異體骨感染。
+extirpate drug
1 . 很多毒品
the police arrested dealers in an attempt to extirpate drug aBuse .在禁毒運動中警察逮捕了很多毒品交易者。