But an oak which has fewer but bigger leaves with stronger reflections, produces a jagged wave form, or what we called a rough echo.
但是，橡树的叶子少而又大，反射力较强，会产生参差不齐的声波，或所谓的“粗糙回声”。
2
The first member of the Kogi people of Colombia ever to visit Britain is wearing traditional rough cotton clothes and has a cloth bag slung over each shoulder as he chews toasted coca leaves.
And smaller leaves than waking up, it found himself staying in a string bag, a fisherman with a rough hand to remove small leaves thrown on the ground.