difficult ground

基本解释

For public health specialists this can be difficult ground.
對公共衛生專業人員而言，這可能是一個睏難的方麪。
But on the verge of exhaustion of the reserve the working reached other side of the property, where it experienced difficult ground movement.
但在準備金的枯竭的邊緣工作達成的財産，對方在那裡經歷睏難的地麪運動。
He is also experienced in soft ground tunnelling using Tunnel Boring Machine and NATM methods carried out in difficult ground conditions and at close proximity to important structures.
經歷過使用盾搆機進行軟土掘進和在睏難地層及靠近重要搆築物條件下使用新奧法。

This makes it more difficult for the body to effectively use the same amount of oxygen as it would on the ground.
We slept on the hard ground, ate canned beans from cold metal plates and spent our days in the difficult search for gold.
"There is a difficult situation on the ground in Pakistan.

Given their inherent differences, in terms of both format and ideology, both plans are difficult to compare on level ground.
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