飞机穿透厚厚的云层慢慢向下降落。
与漫天飞舞的雪相遇，又改道向下降落。
当关井时，柱塞沿生产管柱向下降落。
When the well is shut-in, a plunger is dropped down the production string.
那个飞着的东西靠得更近了，展开翅膀，绕着他们的船飞了一圈，然后向下滑行，强壮有力的翅膀轻轻扑打了几下，降落下来，在距莱拉几码远的木甲板上停了下来。
The flying thing came closer and circled the ship on outspread wings. Then it glided down and landed with brisk sweeps of its powerful pinions, and came to.
那个飞着的东西靠得更近了，展开翅膀，绕着他们的船飞了一圈，然后向下滑行，强壮有力的翅膀轻轻扑打了几下，降落下来，在距莱拉几码远的木甲板上停了下来。
The flying thing came closer and circled the ship on outspread wings. Then it glided down and landed with brisk sweeps of its powerful pinions, and came to.
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