He carefully surveyed the ridges and knolls once more , and also the ravines and gullies.他又注意地巡视着那些梁和峁, 还有沟和壑.Expertly he zigzagged his way across the field, avoiding the deeper gullies.他熟练地左一拐右一拐地绕过深沟，穿过了原野。In such area...
外宾们站着不动约莫有一分多钟之久,张口凝视着这个世界奇迹 -- 长城.For more than one minute our foreign guests remained standing still gaping at this wonder of the world -- the Great Wall.约莫6点钟光景, 比尔决定最好还是回家.About six o'clock, Bill decided he'...