because down at street level, there is a lot of potential prey. 是因为城市近地面生活着许多猎物
not least because their stems just won't stay still. 主要是因为草茎不会静止不动
because the pools where he's come from have already dried up. 因为他所在地方的水源已经完全干涸
because they leave messages in a few special places. 因为他们会在几个特殊地点给对方留下信息
Fish crowd here, because the volcano forces nutrients to the surface 鱼类在这里大量汇聚的原因是 火山迫使洋流把海底的养分送上水面
Because it devotes so little energy to swimming, it only needs a meal once a month. 因为它游泳耗费的能量极少, 所以只需每个月吃1顿饭
Creatures are scarce because few can eat conifer needles. 这里缺乏生物的原因是很少有生物以针叶为食
because they lie at a giant crossroads. 因为它处在一个巨大的十字路口