In 1929, three years after his flight over the NorthPole, the American explorer, R.E. Byrd, successfullyflew over the South Pole for the first time. Though,at first, Byrd and his men were able to take a greatmany photographs of the mountains that lay below,they soon ran into serious trouble. At one point, itseemed certain that their plane would crash. Itcould only get over the mountains if it rose to10,000 feet. Byrd at onceordered his men to throwout two heavy foodsacks. The plane was then ableto rise and it cleared the mountains by 400 feet. Byrd now knew that he would be able toreach the South Pole which was 300 miles away, for there were no more mountains insight. The aircraft was able to fly over the endless white plains without difficulty.
精讲笔记：
7. Byrd now knew that he would be able to reach the South Pole which was 300 milesaway, for there were no more mountains in sight.
伯德这时知道他能够顺利飞抵300英里以外的南极了，因为前面再也没有山了。
语言点 本句句式很繁杂，其中that引导宾语从句，which引导定语从句，for引导原因状语从句。
8. The aircraft was able to fly over the endless white plains without difficulty.
飞机可以毫无困难地飞过这片茫茫无迹的白色原野!
语言点 without difficulty意为“毫无困难地”，做状语。
