it rains so much that, for part of the year, 由于降雨量特别大 一年中总有一段时间
are hit by thousands of avalanches every year. 每年要发生数千起雪崩
Its warmth melts the snow early in the year. 火山的热量每年早早地融化了积雪
Once a year, they must all return to the sea to breed, 每年它们都会回到海洋中进行繁殖
provide a sanctuary for sea birds all the year round. 是海鸟们全年的庇护天堂
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
This is the best feeding opportunity they will get all year. 这是它们一年里最佳的捕食时机
Female dragons come into season only once a year. 雌性巨蜥一年发一次情