previouslyadv.先前;在此之前
previousadj.以前的;先于;在 ... 之前
Previous defence installation防范装置
Previous heat shock treatment热休克预处理
previously-defined statement[计] 先前定义语句
Previous history of milk fever过去有乳牛热病史
previously isolated chromosome以前隔离染色体
Previous known suicide attempt知以前企图自杀
previous difference PID control微分先行PID控制
previous conviction cancellation前科消灭