1·Krebs investigated experimental plots in Canada's Yukon territory that contained hare populations.
克雷布斯调查了加拿大育空地区含有野兔种群的试验田。
2·Krebs hypothesizes that the herons in smaller flocks are watching for herons that they might follow to better feeding pools, which usually attract larger numbers of the birds.
克雷布斯假设，小群的苍鹭是在观察，它们可能会跟随被观察的苍鹭去更好的觅食池，那里通常会吸引更多的鸟类。
3·A soldier's home "is about a soldier named Krebs returning to his hometown."
“士兵的家”是一名士兵名为克雷布斯返回家乡。