Air slipping along the fuselage moves slower, so the engines ingest less oxygen and burn less fuel.

机身上流动的空气速度减慢，所以引擎的吸氧量减少从而节省了燃料。

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The farther the air is from the fuselage, the faster it moves. That can produce undesirable stress on an engine’s components.

气流通过机身的距离越长，它的速度就越快，会对发动机部件产生不必要的压力。

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The big challenge is figuring out how to design the air intakes to maximize airflow over the fuselage.

最大的挑战是如何设计进风口以使机身气流最大化。

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The rear of the fuselage is also sculpted to sweep air into the engines using a process known as boundary-layer ingestion.

ECONOMIST: The aircraft of the future

The farther the air is from the fuselage, the faster it moves.

ECONOMIST: The aircraft of the future

Frictional drag means the air closest to the surface of the fuselage moves more slowly than the rest.

ECONOMIST: The aircraft of the future