优秀率是指在一个总体中，优秀的个体占总体的百分率。
赵明：我学习成绩一直不错，优秀率是90%，优良率是100%。
Zhao Ming: I have been doing quite well. As reach 90% and Bs reach 100%.
在全国英语四、级考试中，中国政法大学的通过率和优秀率在北京各高校中名列前茅。
In the national CET4 and CET6 tests, the passing and excellence rate of its students head the list of universities in Beijing.
孔底沉渣少，孔壁受泥浆影响和冲刷小，钻孔质量优秀率高，能够满足各种类型的基桩要求。
It produces little settlements at the bottom, less disturbance and erosion of mud to the walls. It provides a high rate of quality boreholes and meets requirements of various foundation piles.
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