He found after dissection that the narrow anterior gut of the larvae, which derive their nutrients through external digestion, was ulcerated by the pesticides consumed by the poisoned snails.
解剖後發現，以「體外消化」方式吸收養分的螢火蟲，前腸非常細薄，吃了有農藥殘留體內的毒蝸牛，腸子竟然都潰爛了。