She may have traveled one thousand miles from her feeding grounds 因为她从1000英里外的进食地赶来
may grow at speed but their existence can also be short, 生长速度虽然很快,不过存在的时间也可能很短
Suddenly, unpredictably, they may become inactive. 说不定突然间它们就会消失
Days may pass before prey swims close enough for it to strike. 它可以在这里挂好几天. 直到猎物近到让它可以发动攻击
There's a chance that, eventually, it may spot a weakened fish that's catchable. 可能到最后可以找到一条 容易抓到的老弱的鱼
This may be the single largest dose of fertilizer in the natural world. 这可能是自然界最大剂量的一只营养针
may not be the richest in animal life 可能不是动物的乐园
The northern forest may be the largest on Earth 地球北部的森林可能地球上最大的森林了