英语语法分析

Yuan Dynasty was the fastigium of its usage.

元明时期，是使用的高峰期。

Xiaoli says. 2005 fastigium, profit margin can be achieved 50%.

小李说。在2005年高峰期，利润率可以达到50%。

The result showed, that the fastigium of runoff yield and sediment yield were in accordance with the rainfall fastigium.

结果表明：径流小区产流、产沙量的高峰期与降雨量的高峰期相一致。