For a sharper image you can make a better pinhole by cutting a one-inch square hole in the carton, taping a piece of aluminum foil over this hole, and then making the pinhole in the foil.

要想看到更美地景观，你行的意思可以做一个更好地观察孔可以。在纸箱内切一个一英寸地方型孔，在孔上贴一层铝泊片，然后在泊片上打个孔可以。

youdao

For a sharper image you can make a better pinhole by cutting a one-inch square hole in the carton, taping a piece of aluminum foil over this hole, and then making the pinhole in the foil.

要想看到更美地景观，你行的意思可以做一个更好地观察孔可以。在纸箱内切一个一英寸地方型孔，在孔上贴一层铝泊片，然后在泊片上打个孔可以。

youdao