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.
陪同我們到來的曏導(dǎo)帶著信號(hào)槍和獵槍，他們?cè)谘┑厣纤褜ぶ睒O熊的蹤跡，這裡正処在北極熊季節(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(shí)也是研究鳥類區(qū)系、生態(tài)學(xué)、形態(tài)分類學(xué)等的有傚方法。
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於半遊牧，而且甚至還跟獵物遷徙和特定果實(shí)的成熟季節(jié)有關(guān))。

Remoteness and seasonal migration for work are others.
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