Modern farm machines such as tractors, harvesters and threshers have replaced yaks that were used for cultivation and shelling in the past.
昔日“二牛抬杠”种地，牦牛踩场打麦的传统生产方式，逐渐被轰鸣的拖拉机、收割机、脱粒机等现代农机所代替。
These massive fish (the wingspans of Maldives mantas can reach 12 feet) are dynamic filter feeders, shoveling their shoe-box mouths through krill like threshers through wheat, inhaling prey.
这种大型鱼类(马尔代夫蝠鲼翼展可达12米)是动态的滤食者，它们的大嘴吸入食物就如同向小麦脱粒机里铲麦子一般。
These massive fish (the wingspans of Maldives mantas can reach 12 feet) are dynamic filter feeders, shoveling their shoe-box mouths through krill like threshers through wheat, inhaling prey.
这种大型鱼类(马尔代夫蝠鲼翼展可达12米)是动态的滤食者，它们的大嘴吸入食物就如同向小麦脱粒机里铲麦子一般。
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