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1·The activity duration of crop is about 40 days, two times the period.

作物旺盛生活期为40天，相当于两个周期。

2·There is a five second activity duration to account for the serial transfer of data to the printer.

需要用五秒钟的活动持续时间来安排到打印机有序传输数据。

3·A. Lengthen the estimated activity duration for all activities scheduled to occur the following winter.

把以后几年冬季要发生的所有活动的估算历时都加长。

4·A project manager obtains weighted average duration estimates from the team to aciculate activity duration.

一个项目经理通过计算项目组成员提供的活动历时估算的加权平均值来得到活动历时。

5·Activity Duration estimating-estimating the number of work periods which will be needed to complete individual activities.

关系工期评估-评估完成单个关系所需的工作时间的数量。

6·It also gives a construction approach for approximating the probability density function of activity duration, which will facilitate the computer simulation of the PERT diagram.

本文还给出了一种简练的函数构造法，用该方法构造的函数能较好地逼近活动工期概率密度函数，方便了对计划网络图的计算机仿真运算。

7·The results are as follows:(1)Both spring bud and summer bud may form the climbing or short branch, but there are great differences in the activity duration of bud and the branch length formed.

结果如下：1芽按活动时间分为春芽和夏芽； 两类芽均可形成长枝（攀援枝）或短枝，但在活动持续时间和抽生攀援的长度方面存在明显差异；

8·Likewise, expectations must be set for the duration of the performance testing activity.

同样，您必须设置性能测试活动的预期的持续时间。

9·It is appropriate to start with smaller amounts of physical activity and gradually increase duration, frequency and intensity over time.

适宜的方法是，从较小的活动量开始，然后随着时间的推移，逐渐增加持续时间、频度和强度。

10·Aerobic activity should be performed in bouts of at least 10 minutes duration.

有氧活动应该每次至少持续10分钟。