We introduce the concepts of semi-open sets and semi-continuous functions, and discuss some of their properties in fuzzifying topology.
给出了不分明化拓扑空间中半开集和半连续函数的概念，并讨论了它们的某些性质。
In their last meeting, Djokovic saved two match points as he came from two sets down to beat Federer in the US Open semi-finals.
在他们的上次交手——美网半决赛上，德约科维奇在两盘落后的局面下挽救两个赛点而击败费德勒。
Next to Paris where the world number one Rafael Nadal is through to the semi-finals of the French Open tennis after a straight-sets win over Robin Soderling.
下面让我们转到巴黎，在直下三盘击败罗宾•索德林后，世界网球男子头号选手拉斐尔·纳达尔进入了法网公开赛半决赛。在半决赛的四人中，纳达尔将面对安迪·穆雷。
Next to Paris where the world number one Rafael Nadal is through to the semi-finals of the French Open tennis after a straight-sets win over Robin Soderling.
下面让我们转到巴黎，在直下三盘击败罗宾•索德林后，世界网球男子头号选手拉斐尔·纳达尔进入了法网公开赛半决赛。在半决赛的四人中，纳达尔将面对安迪·穆雷。
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