fold the paper in half

把纸对折

fold one's arms

交叉双臂

fold an umbrella

收拢伞

The table folds up when not in use.

这桌子不用时就折叠起来。

The flying vehicle has four wings that fold up so it can be driven like a car.

这辆会飞的车有四个能折叠的车翼，这样它就能像汽车一样驾驶。

fold a baby in a blanket

把婴儿裹在毯子里

folds of a dress

连衣裙的裙褶

Cut the paper along the fold.

沿着褶痕把纸剪开。