向下的英文：
down
downward

Drag .. down; pull .. down
把..向下拖

Fold down;fold up
折向下

You click on the menu, and it drops down.
单击菜单，它就向下展开。

The sledge coasted down the slope.
雪橇沿着山坡向下滑行。

The salt water, being more dense, flows upstream under the fresh water which is flowing downstream
淡水在上层向下流动，比重更大的盐水在下层逆流向上。

These chairs can all fold down small to put them away.
这些椅子全都可以向下折缩小收起来。

The rapid downward motion of the fuselage is stopped by the impact through the landing gear
起落架与地面的撞击阻止了机身迅速地向下运动。

Swing the pivot paper downwards so that point A meets A1.
将纸向下旋转，因此A点与A1点重合。

During the pull-down, if a downward butterfly kick is taken, it must be followed by a breaststroke kick.
在大划手之当下，如果施行一次向下蝶式踢腿，则必须拌随一次蛙式踢腿。

Plug the Motorola charger into the headset, with the charger’s release tab facing down and the headset facing up.
将摩托罗拉充电器插入耳机中，耳机朝上，充电器插头上的开锁钮向下。

To slope downward;descend.
向下倾斜；下倾

Prices started a downward plunge.
价格开始猛跌。

To bend or curve downward;stoop.
弯向下弯曲；俯曲

bow:To bend or curve downward; stoop.
弯:向下弯曲;俯曲。

To move a hopper or stacker upward or downward.
上下移动送卡箱或接卡箱。