once they have a hold, they never let go. 一旦被它逮住 猎物再无逃脱的机会
But these forests hold fewer challenges for the more mobile. 不过这些森林对于更灵活的动物来说 却没有什么挑战性
its summit too steep to hold a snow field. 高峻挺拔的峰顶甚至无法附着积雪
Further north, they hold other dangers. 在更远的北方 它们还潜藏着其它危险