Top brands can be on the pricey side so if you're on a budget grab a cheap substitute such as a silver car sunscreen, reflective tanning mat or wrap a circular sheet of cardboard in aluminum foil.
名牌的反光板太昂贵，你可以用个便宜的替代品，比如银色的车用防晒遮光剂，反光的皮革衬垫，或者自己弄个一张包着铝箔的圆卡片。
Rock wool board can also be moisture-proof foil surface sticky, black (white) glass fiber mat reinforced fiberglass cloth folder, and moisture and other decorative veneer.
亦可在岩棉板表层粘防潮铝箔、黑(白)玻纤布夹筋玻纤毡等装饰及防潮贴面。
I used four little balls of foil and then a Xiaolongbao steaming mat on top.
我用了一个蒸小笼包的草垫，下面用了四个锡纸球架着。
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