持续时间

However, steatosis was not related to duration of HIV, ARV exposure, or HCV coinfection.

但是，脂肪变性与HIV间、ARV暴露或HCV合并感染无关。

The pupil's attention span was short.

这个小学生的注意力间很短。

So the bumpiness, the rising high altitude, and the long duration of these two things made this short distance of the road the toughest.

崎岖不平的道路，逐步升高的海拔，和很长的间使这段路程成为了最艰难的段。

It was proved that it is important to control the duration, intensity and supercompensation of overload training, which is of significance to the cardiovascular system.

这证明，把握好负荷训练的间、强度和量恢复对心血管系统至关重要。

The two transpolar shortwave time signal circuits,Moscow and Irkutsk to the Great Wall Station in Antarctica, are used to study the fading characters for shortwave long circuit.

为了研究过极区的短波长电路的衰落特性，在南极长城站收测莫斯科、依尔库茨克的短波授台信号，并给出各频率对应的衰落深度、衰落率、衰落平均间等参数的统计特征和衰落幅度分布曲线。