岳阳楼记原文中的五个高频句子及其翻译如下：

1. 岳阳楼者，天下之雄观也。

翻译：The Yuelu Tower is a magnificent sight in the world.

2. 气吞万里如虎，波撼岳阳城。

翻译：With its breath, it seems to swallow a million miles like a tiger, and its waves shake the city of Yuezhou.

3. 先天下之忧而忧，后天下之乐而乐。

翻译：Worry about the world’s troubles before others do, and enjoy the world’s joys after others do.

4. 水光潋滟晴方好，山色空蒙雨亦奇。

翻译：The water shines beautifully in the sunlight, and the mountains are mysterious and wonderful in the rain.

5. 岳阳楼记，记楼之盛也。

翻译：The Record of Yuelu Tower is a record of the grandeur of the tower.