Once started the foot long flowers can open fully in less than a minute. 长长的花可以在1分钟之内完全展开…
The nutrients in a generation of cicadas are returned to the soil, all at once 这些蝉给土壤提供了大量养分
For turtles and other inhabitants of the forest this is a feast they're lucky to see once in their lifetime and they gorge themselves while they can. 对于龟和其他森林居民来说, 可能再也没有运气能这样狼吞虎咽,大快朵颐
Once the mother and calf have reached their feeding grounds, they will separate. 一旦母鲸和小鲸到达他们的给养地 它们就要分开
Perhaps such hunting alliances were once a common sight 或许这种事情曾经发生在印尼的大多数珊瑚礁中.
When they return to the forest, they will have to go their separate ways, once more. 当它们返回树林时,它们将再一次分开
Once the prey is captured, the spider hauls itself back up it's silken safety line. 一旦猎物到手,蟹蜘蛛还可从水中全身而退
Once onboard, the waxy sides of the pitcher ensure there's little chance of escape. 当昆虫被引诱过来时 光滑的内侧唇瓣使得昆虫鲜有机会逃跑
Once settled, they begin to serenade their unseen females. 站定之后,他们开始给还没出现的雌蛙唱小夜曲
This rich pasture once supported the greatest herds ever seen on our planet. 这里的大草原肥沃甘美 曾经养育着地球上最大的动物群落