1.
the dorsal fin is the vertical fin on the back of a fish and certain marine mammals.
背鳍就是在鱼或者某些海洋哺乳动物背上的垂直鳍。
2.
voracious snakelike marine or freshwater fishes with smooth slimy usually scaleless skin and having a continuous vertical fin but no ventral fins.
任一种蛇形的淡水鱼，体表光滑无鳞，有连续的垂直背鳍，缺少腹鳍。
3.
frogfishes; tropical spiny-finned marine fishes having large nearly vertical mouths; related to toadfishes and anglers.
躄鱼；热带刺鳍海洋鱼类，嘴较大，且近乎垂直；与蟾鱼有关。
4.
Another new detail is on the turning vanes, which now feature a triangular, vertical fin (2).
另一项新细节在导流翼上，现在这片小翼变成一个三角形且垂直的鳍（2）。
5.
To lash the water with the fins. Used of a dying whale.
猛烈地挥动鳍用鳍拍打水，常用于垂死的鲸
6.
Something vertical, as a line, plane, or circle.
垂直物垂直的东西，比如垂直线，垂直面或垂直圆
7.
A vertical or nearly vertical line or plane.
垂直线，垂直面垂直或近似垂直的线或平面
8.
adjust with a plumb line so as to make vertical.
用铅垂线调整使得垂直。
9.
In a vertical or perpendicular line.
垂直地在一条垂直线或竖直线上
10.
black-and-white drumfish with an erect elongated dorsal fin.
长有细长直立背鳍身体花白的石首鱼。
11.
vertical ascent
垂直上升(悬停前)
12.
normal force
法向[正交、垂直]力
13.
Involving a perpendicular or rightangle relationship.
指垂直或直角关系。
14.
The helicopter flew up vertically
直升机垂直向上飞起。
15.
jump vertically, with legs stiff and back arched, as of horses.
垂直跳，腿僵直，后背拱起。
16.
Normal incidence
垂直入射(亦见直射声束)
17.
inner or outer surface of sth more or less upright
（垂直或近似垂直物的）内侧或外侧
18.
A sheer incline, such as the face of a cliff.
落差垂直落差，如悬崖的垂直落差