down and up meaning in English
上下来回的
Examples
- I've been having the wildest shifts of months, up and down and up and down again .
我几个月来情绪变化得十分厉害，老是忽高忽低的。 - Wind was very common rushing both down and up the tunnels
风在地道中不断吹上吹下。 - Methods navigate down and up the navigation stack , respectively , by the required number of entries
方法根据所需的项数在导航堆栈中向上和向下定位。 - As it travels down and up the execution code path , and examined by various objects along the path
沿执行代码路径往返传播并且由该路径中的各个对象检查时，可将对象添加到其中。 - To coordinate the four - stroke cycle , a group of parts called the valve train opens and closes the valves ( moves them down and up , respectively )
那些打开和关闭气门的气门传动是为了协调四冲程的工作循环(使他们各自上下移动) 。