This is what it looks like: the people have to tap them twice a day -- just a millimeter slice -- and the only thing you harvest is sugar water, carbon dioxide, rain fall and a little bit of sunshine.
这看起来是这样的： 人们只在这些树上刮采几毫米片，一日两次， 仅仅采收糖水， 二氧化碳、降雨量和一点点的阳光