The paper describes the safety on downgrade successive route and in running direction of trains in sections and analyzes the advantages and disadvantages at the same time.
本文论述了下坡道延续进路与区间列车运行方向的安全问题，同时分析了利弊。
2
Down the hall, the girls in Carol Anderson’s second grade classroom are sitting in groups of three and four.
沿着走廊走下去，凯洛尔·安德森班里的二年级的女孩们正以三四个人为一组的形式坐着。
3
For example, if you are prone to discounting a good grade on an exam, write down any past successes of an intellectual nature.