frost-free period
自由水清除率
free water clearance【生理】
暂无补充释义。
相关词条
free
free-trade port，free port
the low-tax, tariff-free zone; bonded area; tax-protected zone
free and easy
by-pass check valve (free-wheeled checkvalve)
by-pass check valve (free-wheeled check valve)
six bowels fulfill their purposes when there is free flow