Form a double thickness of heavy-duty foil (about 14 in. square); cut three slits in foil.

做一个双层金属箔（大约14英寸见方），在上面划三道口。

youdao

Form a double thickness of heavy-duty foil (about 14 in. square); cut three slits in foil.

做一个双层金属箔（大约14英寸见方），在上面划三道口。

youdao