沿着海岸线或河流向海洋航行、移动或划行：指沿着海岸线或河流向海洋航行、移动或划行。
落下
下拉
... drop down 落下；顺着向下移动 drop in on sb 拜访某人；顺路拜访某人 drop it off 把它放到...
... Drop out 退出，辍学 Drop down 卧倒，顺着 Float 指物停留在液体或者流体悬浮而不下沉，多强调一种静态，而不是漂走 ...
... drop down 落下；顺着向下移动 drop in on sb 拜访某人；顺路拜访某人 drop it off 把它放到...
... close down 关闭 ; 查封 ; 倒闭 ; 关门大吉 drop down 落下 ; 卧倒 ; 顺着向下移动 ; 倒下 jot down 略记下 ; 匆匆记下 ; 草草记下 ; 摘要记载下来 ...
The painting started to drop down in its frame and was shredded by some blades hidden in the bottom of the frame.
那幅画从框中脱落掉下来，被藏在画框底部的刀片切成了碎片。
Outside there was a sheer drop down to the sea below.
外面是一道陡坡，直插大海。
We'd drop down dead—don't you know that?
我们会倒地而死——你不知道吗？
Two, so now let me drop down 2.
，把2写下来。
计算机科学课程节选 : 哈佛公开课
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。
聆听音乐课程节选 : 耶鲁公开课
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。
化学原理课程节选 : 麻省理工公开课
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
But they will still drop down to Division Two if Warwickshire collect another point at Hampshire.
There is a huge drop down to number-two Dell, which has scrabbled to double digits (10.4% in 2Q11).