drop down

基本解释

Choose the server or cluster to add the bus from the drop down menu.
从下拉菜单中选择要添加到总线的服务器或集群。
Instead, he recommends regular stretching exercises, like standing with your toes on a step and letting your heels drop down.
于是，他建议女性做些常规的伸展练习，比如踮起脚尖站在台阶上，再缓慢放下脚跟。
All other things being equal, when the ball receives a jolt of energy, it is more likely to drop down a step than to pop up one.
在所有其它因素不变的情况下，当球受到能量的撞击后，它滚下一个台阶的概率要大于跳上一个台阶。

Two, so now let me drop down 2.
，把2写下来。
哈佛公开课 - 计算机科学课程节选
It's going to be a I chord, then a IV chord,and we'll drop down to the IV chord.
它现有一个I级和弦，然后是IV级和弦，接着我们往下降到IV级和弦。
耶鲁公开课 - 聆听音乐课程节选
So this is our final equation, and this is actually called the Balmer series, which was named after Balmer, and this tells us the frequency of any of the lights where we start with an electron in some higher energy level and we drop down to an n final that's equal to 2.
把2代入到这里，所以得到1除以,这就是我们最终的方程，这叫做Balmer系，以Balmer名字命名的,它告诉我们从高能级掉到n等于2的,最终能级所发出光的频率。
麻省理工公开课 - 化学原理课程节选

Select from expansive drop down menus that feature activities such as elliptical, swimming, hiking and more.
ENGADGET: Preva Mobile for iOS aims to track your workouts, keep you going to the gym