1.总攻开始了 军号声 枪声 炮声 、喊杀声 立刻震动了山谷 加标点

英语翻译

窝知道你们最·好·了~这个时间段一定有很多英·语·D在线的对吧.
么么哒球帮忙翻译顺便这里是帅比总攻啊霏←←总之球勾搭球深交球企鹅菌什么的☆
那么下面是文章↓
Personal transportation in America is mostly by car. Most families have two cars, one for the husband and the other for the wife. So they could have jobs a great distance from each other. But in large cities, many people take a bus or a subway to work. If they drive their cars, they may have to pay a high fee for parking the car in the city. To travel from city to city, most Americans use the plane unless the distance is very short. Because they don’t want to spend too much time traveling when they work. A few cities are near the rivers.People there can take boats cross the river.Choosing the best way to get to work and return home make Americans have more time for family life.
感激不尽哟www!

物体利用定滑轮向上运动时,克服物体重力做的功是有用功,克服摩擦力做的功是额外功,那克服什么做的功是总攻呢?
原题是 有个小盆友跳台阶 不是滑轮