And if a female replies, they pair up, posing like statues. 如果有雌企鹅回应, 它们就结成一对,共同摆出雕像般的姿势
swarms join up with other swarms 一团蝗虫云也会和其它蝗虫云汇合
It's a rare chance for them to build up their food reserves. 这是它们仅有的积累食物储备的机会
sucking up the water as soon as it appears. 水一边流淌一边被它吸去
but this herd concentrates on digging up the roots, 但这群象却忙着挖掘草根
that these elephants walk up to 50 miles a day 所以这些大象每天得走上50英里
as they travel up the dry river channels searching for something to eat. 沿着干涸的河床搜寻一些可以吃的东西
and they are squaring up for a duel. 它们正摆好架势准备激战
When full, a saguaro stem can store up to five tonnes of water 吸饱水后 弁庆柱的茎干中 已储存了5吨左右的水