seasonal migration

基本解釋

We are accompanied by guides armed with flash pistols and hunting rifles, scanning the snowfields for polar bears for whom this is a seasonal migration route.
陪同我們到來的向?qū)е盘枠尯瞳C槍，他們在雪地上搜尋著北極熊的蹤跡，這里正處在北極熊季節(jié)性遷移的路線上。
Bird banding is one of the important means to research the seasonal migration of birds, and is an effective method in researching the faunas, ecology and morphology of birds.
環(huán)志是研究鳥類季節(jié)性遷徙的重要手段之一，同時也是研究鳥類區(qū)系、生態(tài)學、形態(tài)分類學等的有效方法。
Their lifestyle is semi-nomadic, and the movements are somewhat seasonal, having to do with the migration of some prey animals, and the gathering of certain plants and fruits.
他們的生活方式類似于半游牧，而且甚至還跟獵物遷徙和特定果實的成熟季節(jié)有關(guān))。

Remoteness and seasonal migration for work are others.
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