large shallow depression 大面积浅凹陷
The Qi of meridian infuses into the shallow depression of the elbow like water flowing into a marsh.
经气流注至此，入曲肘浅凹处，犹如水进沼泽。
This hut was built over a shallow depression that was covered with a timber framework. Mammoth hides were drawn over the timber and anchored with bones and stones.
该棚屋建于一处浅洼地上，上方是木质大梁。
This method has proved to be very good in its application for shallow gas exploration in Jiyang Depression.
本方法已在济阳坳陷的浅层天然气勘探中应用。实践证明其效果良好。
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