Airspeed is how fast a plane is moving through the air around it. That is what the wings feel, and it is what pilots watch, because a wing needs a certain rush of air to keep the plane up.

Airspeed is how fast a plane is moving through the air around itairspeed是指飛機相對於周圍空氣移動的速度。That is what the wings feel這是機翼感受到的東西，and it is what pilots watch也是飛行員在看的數值，because a wing needs a certain rush of air to keep the plane up因為機翼需要一定的氣流才能讓飛機保持在空中。

Though actually, that is not always the same as how fast the plane is crossing the ground. A tailwind can carry you over the land quickly while the airspeed stays moderate; a headwind can make you crawl over the map while the airspeed is high.

Though actually不過事實上 that is not always the same as how fast the plane is crossing the ground這跟飛機在地面上移動的速度不一定相同。A tailwind can carry you over the land quickly while the airspeed stays moderate順風時飛機在地面上移動得很快，但空速可能還是中等，a headwind can make you crawl over the map while the airspeed is high逆風時飛機在地圖上爬得很慢，但空速可能很高。

Everyday speakers sometimes just mean “how fast the plane is going,” which is the tidy dictionary line — but that mixes airspeed with ground speed.

Everyday speakers sometimes just mean “how fast the plane is going,”一般人有時候只是想講「飛機飛多快」，which is the tidy dictionary line這是字典上簡化的說法 — but that mixes airspeed with ground speed但這樣就把空速和對地速度混在一起了。

This is an aviation word. Passengers usually ask “how fast are we flying?”; the cockpit talks airspeed.

This is an aviation word這是航空用語。Passengers usually ask “how fast are we flying?”乘客通常會問「我們飛多快」；the cockpit talks airspeed駕駛艙裡講的則是空速。