1、试运行
... 如果说的是新设备、装置等的试运行，则应当是： trial operation period 试运行 pilot run; test run; preoperation 试运行试验 run(ning)-in test ...
2、前运算阶段
...* 有逻辑的目的性行为goal-directed actions* 前运算阶段preoperation* 符号功能semiotic function ...
3、试转前
... 炸弹提前爆炸 premature explosion of bomb 试转前 preoperation 运转前放大器 preoperational amplifier ...
preoperation guidance术前指导
preoperation procedure术前准备
preoperation care手术前护理
preoperation period前运算阶段;前运思期
preoperation staging术前分期
preoperation service试运行服务
preoperation chemotherapy术前化疗
preoperation diagnosis术前诊断