地下水降落曲线 drawdown curve
向下、降落 down
总下降/降落 Total ascent/descent
下降落下 descend
地下水位降落 lowering of ground water level ; Water lowering ; lowering of ground water level west bank
落下降落 fall
地下水降落漏斗 groundwater depression cone
下滑降落 glide landing
跌落、下降 fall off
这飞机头朝下降落 This aircraft landed upside down ; This aircraft landed at head-down ; This aircraft under head landing
它需要打开降落伞穿过云层下降，把 GPS 坐标发射到手机基站。
It would need to deploy a parachute, descend through the clouds and transmit a GPS coordinate to a cell phone tower.
飞机穿透厚厚的云层慢慢向下降落。
第二种假设似乎不太可能，因为大型翼龙不可能在不损害翅膀的情况下降落在树上。
The second hypothesis seems unlikely because large pterosaurs could not have landed in trees without damaging their wings.
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