uncertainadj.不确定的；不稳定的；易变的uncertainly system不确定性系统uncertain language不确定语言uncertain capacity不确定产能uncertain reasoning不确定推理uncertain fingering不确定指法Uncertain measuring未确知测度uncertain structure不确定性结构uncertain timedelay不确定时延uncertain prognosis预后难定uncertain de-mand不确定需求