应用随机数学等方法，建立预测模型，分析黄河下游来水、用水、降水及断流历时发展趋势，并进行断流长度等预测。
Tendency of precipitation and cutout days is analyzed and cutout length is forecast by using such methods as stochastic mathematics and so on .
本文对我国南方有发展前途的三种热带牧草和三种温带牧草所历时两年的分期播种试验进行了总结。
The two-year periodic experiments of three kinds of tropical herbage and three kinds of temperate herbage with good prospects in South China are summarized in this article.
历时三百余年的大唐王朝，走过了它的发展、壮大、顶峰与衰落的阶段。
Lasting more than three hundreds years, the great Tang Dynasty went across its stages of growth, strength, summit and ending.
历时三百余年的大唐王朝，走过了它的发展、壮大、顶峰与衰落的阶段。
Lasting more than three hundreds years, the great Tang Dynasty went across its stages of growth, strength, summit and ending.
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