You see, you can take out one or two hub trees, 你们看，我们可以拿走一两颗中心树， but there comes a tipping point, 但这样就会达到森林承受极限了， because hub trees are not unlike rivets in an airplane. 因为森林里的中心树就像是飞机里的铆钉。 You can t
Or Malawi: we asked if a birthing center could radically reduce maternal and infant mortality. 或者在Malawi: 我们会问是否接生中心会从根本上减少母婴的死亡率。 Malawi has one of the highest rates of maternal and infant death in t
