History can be retrieved using a sliding, fixed, or current period, or last completed period filter.
可以使用变化区间、固定区间或当前区间检索历史记录，还可以使用上次使用的期间筛选器进行检索。
The best chance in terms of funds of the bridge consolidation is fixed on the principle of "economic life" of the bridge and "the lowest total cost" within the bridge using period.
桥梁加固经济合理时机，是按桥梁的经济寿命和按桥梁任务期内总费用最低原则确定的，即总费用最低时的时间为桥梁的加固时机。
A more precision formula for the period of a simple pendulum is obtained by using the method of variable be partly fixed.
利用“局部常化”方法给出了一个精度较高的单摆周期公式。
A more precision formula for the period of a simple pendulum is obtained by using the method of variable be partly fixed.
利用“局部常化”方法给出了一个精度较高的单摆周期公式。
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