The aircraft's streamlined fairing is designed to minimize drag during flight.

fairing 是名词，由动词 fair（使...平滑、流线型化）加后缀 -ing 构成，指"整流罩"或"流线型外壳"。在航空领域特指飞机外部用于减少空气阻力的流线型覆盖部件。