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vulture 秃鹰
up-droughts 上升气流
Vultures thrive in the rift, because the steep valley walls create up-draughts, which they can use to get airborne.Gliding effortlessly from one thermal to the next, a vulture can cover 200 miles in a day, soaring seven miles high with scarcely a wing flap.
秃鹰在峡谷裂缝中茁壮成长，因为陡峭悬崖制造的回升气流，可以使他们轻松滑翔。在一股热气流中，毫不费力地滑翔到另一个地方，一只秃鹫每天可以飞行200英里，攀升到7英里的高度几乎不用拍一下翅膀。