But the frame of the aircraft itself is to blame for the other half: the bumpy air flow over the undercarriage and the slots and flaps of the wings creates the rest of the racket.

而另一半的元凶则是飞机自身的结构问题：颠簸不平的气流穿梭过往时同起落架、翼缝和襟翼等结构相遇制造了另一半噪音。

youdao

We had a bumpy flight because of air pocket.

我们的飞行甚为颠簸，因为遇到气穴。

youdao

We took off late, the air was bumpy, the plane was jammed, the toilets got stopped up, the food was terrible - we sure weren't happy campers when we landed.

起飞得晚，天气不好，机舱拥挤，厕所堵塞，食物难吃-当我们着陆时，心里当然很不满意了。

youdao

Despite that, over 9, 000 kits each with a laptop, a digital camera, a fingerprint scanner and a card printer will be dispatched across the country, reaching their destinations by air, down bumpy bush tracks or on the dugout canoes that ply Congo's rivers.

ECONOMIST: Worries are growing as Congo's election timetable slips

"The smoke plume of that fire extended some 14km (8.6 miles) into the air and even prevented us from getting aircraft overhead because of just how dangerous and bumpy the conditions were, " RFS Deputy Commissioner Rob Rogers was quoted by ABC News as saying.

BBC: News - Australia bushfire destroys homes and damages observatory