A flat spring or metal form is made of flat material that has been stamped, pressed, or punched.

平面弹簧或金属模板是由扁平材料经过冲压，压制，或冲孔制造而成。

youdao

At least in the early Qing Dynasty, there was the tradion of telling a story by cutting forms on a flat material.

可以肯定的是，至少在先秦时期，中国就有了借用平面材质剪影叙事的传统。

youdao

The material typically used for the pages was parchment, which is animal skin that's stretched and dried under tension, so it become s really flat and can be written on.

书页通常使用的材料是羊皮纸，羊皮纸是一种动物的皮肤，其在张力的作用下被拉伸和变干，因此它会变得非常平整，并且你可以在上面写字。

youdao

Flat-bottom boats have carried eighteen million cubic yards of dredged material to the island.

VOA: special.2009.10.06

Her home was barely even a shack, with walls constructed from a hybrid of any available flat material scraps that they could piece together to form a structure.

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Miracle League builds flat fields out of a material that makes it possible for children to run the bases even if they are in wheelchairs or on crutches or walkers.

WHITEHOUSE: Volunteering and Having Fun

By the '90s, flat-front pants had returned, catching on more fully in 1999, when the broader use of stretchy material in men's clothes attracted more men to the style.

WSJ: The Pleats Plea: Wear These