obtain a class中文什么意思

毕业考试得优等

• obtain:    vt. 得到，获得，买到；达到(目的 ...
• class:    n. 1.阶级;社会等级。 2.学级 ...
• cannot obtain:    得不到

例句与用法

1. Later , professor liu wen studied the sequences of discrete random variables by combining the analytic technique with the approach of generating function and moment generating function and obtained a class of deviation theorems [ 10 ] ~ [ 121
   后来，刘文教授把分析方法结合母函数和矩母函数的方法研究了离散型随机变量，得到了一类强偏差定理。
2. Based on the asymptotic properties for numerical integral formulas , this paper obtains a class of finite difference methods for solving initial value problems of odinary differential equations , and studies the consistency and stability of new methods
   摘要基于数值积分公式中间点的渐近性质，获得了一类求解常微分方程初值问题有限差分方法，研究了新方法的相容性和稳定性。