先前的债项  antecedent debt

先导性试验前的  prepilot

先进的前向纠错技术  advanced FEC

先前订定的租赁协议  pre-existing tenancy agreement

先前居住的地区  Previous district of residence

先天性前臂和手的缺如  Congenital absence of both forearm and hand

B族链球菌引起的先天性肺炎  Congenital pneumonia due to streptococcus group B

被子植物假定祖先的花  proanthostrobilus

比先前略慢  poco meno allegro

病毒性病原体引起的先天性肺炎  Congenital pneumonia due to viral agent

操纵的先导安全阀  pilot operated relief valve

操纵的先导单向阀  pilot operated check valve

操纵的先导阀  pilot operated valve

操纵的先导滑阀  pilot operated spool

大肠埃希杆菌引起的先天性肺炎  Congenital pneumonia due to Escherichia coli

当...的先锋  Spearhead

党的先进理念  advanced concept of the party

党的先进性  the Party’s progress; the Party’s progressiveness; the Party’s advanced quality; CPC)advanced nature

党的先进性建设  construction of the Party’s progressiveness and in; progressive construction of the Party; The Party’s Progressiveness Construction