The Rocky Mountains have rugged mountains and roads.落基山脉有崇山峻岭和崎岖不平的道路.The crests of the Rocky Mountains are known as the Continental Divide.落矶山脉的峰峦有“大陆分水岭”之称.That river flows the Rocky Mountains.那条河发源于洛矶山脉....
It is difficult to turn over in a hammock.在吊床上翻身很困难.We anchored the hammock to the tree.我们把吊床牢牢地系在树上.We swung the hammock between two trees.我们摇晃着挂在两树之间的吊床....
这种点的集合被称为等位面.The set of points is called a level surface.表面本身是一等位面.The surface itself is an equipotential.在等位面与电力线的每个交点, 两者是垂直的.At each crossing of an equipotential and a field line, the two are perpendicular....
The people marched en masse.人们齐步前进。In the warmth of spring, they emerge en masse.温暖的春天到来后, 它们又会出现在大地上.Individually the children are delightful; en masse they can be unbearable.孩子们单独时还讨人喜欢, 一多了就受不了了....