Each year they spend six months apart, travelling the ocean. 每年他们都将分开六个月 各自在海上飞行
Frigatebirds spend months continuously airborne at sea 军舰鸟可以在海上持续待几个月
Many predators spend much of their time cruising the open ocean 许多掠食者把大部分的时间用在来回巡游
spend most of their lives in the high canopy and only come down when it's time to breed. 大部分时间在高高的树冠层生活 只有在交配繁殖时期才会下来
All these animals spend their entire lives within the cave. 所有这些动物都在洞穴内度过一生
which spend part of their day resting on cave walls. 它们一天大部分时间都呆在洞壁上