通心阳

relapse-free survival

Serum-free and Specialty Media and Reagent

by-pass check valve (free-wheeled check valve)

free navigation

distortion-free【电子】;distortionless【电子】;orthoscopic【物】

duration of frost-free period【农】;frost-free period【农】;frost-free season【农】

free radical induced catalysis

free of particular average clause