The second class could pick their own deadlines for each paper at the beginning of the course.

第二个班可以在课程开始前为他们的论文确定最后期限。

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Based on the present humanities education state, this paper analyses some ways to achieve it (much attention is paid to the second class) and several factors that influences it.

本文结合工科院校人文素质教育现状，分析了各类实现途径(特别是第二课堂)和若干影响因素。

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This paper is devoted to study the existence of an infinitude of periodic solutions for a class of second order linear PDE systems without damping.

本文首先给出了一类具有无穷多个周期解的无阻尼二阶线性偏微分方程所描述的系统。

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Four decades ago, women and minorities were second-class citizens at the paper.

NEWYORKER: Changing Times