Of 68 tits' nests built that season in the experimental areas, 26 included wool from a dispenser.

在那个季节，试验区的山雀筑造的68个巢中，有26个使用了取食器里的羊毛。

The surrounding province of Hebei has been earmarked as an experimental area for industrial transition and upgrading.

北京周边省份河北省定位为产业转型升级试验区。