1.
bidirectional flow
双向流动, 双向流(程)
2.
Direct current flows in one direction only. Alternating current flows first in one direction and then in the other.
直流电流仅向一个方向流动,而交流电流则先向一个方阿流动,继而又向另一个方向流动
3.
By AC it is meant that the current is flowing first in one direction and then back again.
交流电是指电流先流向一个方向，然后反方向流动。
4.
The current flowing in one direction is called direct current .
沿着一个方向流动的电流叫做直流电。
5.
The difference between a direct and an alternating current is that a direct current always flows in one direction.
直流电和交流电的区别在于直流电总是向一个方向流动。
6.
points of mean axial fluid velocity
平均轴向流体速度点
7.
To drift diagonally or sideways.
斜向飘流，横向飘流
8.
A current that flows in an opposite direction to the flow of another current.
逆流，反向电流；逆电流与另一水流或电流的流向相反的水流或电流
9.
(of water)flow in the specified direction
（指水）（向某方向）流动
10.
horizontal and vertical occupational mobility
横向和纵向职业流动
11.
In the direction of a stream's current.
顺流的顺着溪流的方向
12.
reverse gate current
逆门极电流反向栅电流
13.
flow straightener
导流板,流体导向叶片
14.
A current flowing across another current.
交叉水流流向与另一水流交叉的水流
15.
Steam trap flow direction in accordance with that of the pipe line.
疏水阀的流向要与管路流向一致。
16.
horizontal social mobility
横向社会流动 横向社会流动
17.
The trend of most rivers in our country is from west to east.
我国河流的流向大多是由西向东。
18.
To reverse the direction of(an alternating electric current)each half - cycle to produce a unidirectional current.
变换电流方向颠倒每一半周（交流电流的）方向，以产生单方向性电流