All her efforts to keep him on the straight and narrow have been rewarded.
她为了让他走正道所作出的一切努力都得到了回报。
《柯林斯高阶英汉双解学习词典》
At the same time convert the angle of the polygon at that vertex a straight angle.
同时把该顶点处多角形的角转换成平角.
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清龙: 一种花色序数相连的三个顺子的组合.
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