flattens

a large cloud of gas and dust begins to congeal gravitationally, starts rotating, and eventually flattens into an object called a protostellar disk.

由气体和尘埃构成的巨大云团在引力的作用下开始凝缩，并且开始旋转，最终变平成为平面状物体，这种物体被称为原恒星盘。

The Swash is a washing machine and iron inone that refreshes clothes, removes odours and flattens out wrinkles at thepress of a button-and does so all in the time it takes to have a shower.

这种Swash产品是洗衣机和熨斗一体机，可对衣服进行清新和去除异味，并且按下按钮后还能熨烫——所需要的时间相当于洗一次澡。

Returns the value of the second parameter if the value of the first parameter is true, and flattens the source document hierarchy.

如果第一个参数的值为真，则返回第二个参数的值，并平展源文档层次。