of other metals to change the properties of the basic  在金屬中加人少量其他金屬，而改變其性質(zhì)的一種金屬

metal.                                               混合物。

ALPHA SPEED, Minimum airplane speed.                 迎角速度，

                                                       飛機(jī)的最小速度。

ALPHA VANE, A small moveable airfoil on the side of  迎角葉片，

the fuselage transmitting airplane angle relative to   位于機(jī)身側(cè)的可動(dòng)小翼面。為失速警告系統(tǒng)傳輸飛機(jī)對

airstream for the stall warning system.              氣流的相對角度。

ALTERNATE, To change from one condition to another.  交替，

                                                       由一個(gè)狀況改換到另一個(gè)。

ALTERNATE , An additional airport selected during    備降場，

flight planning, usually near the destination airport, to be 制訂飛行計(jì)劃時(shí)，除了目標(biāo)機(jī)場之外，所選的另一個(gè)機(jī)

used when it is desirable to divert from the original 場。通常在目標(biāo)機(jī)場附近，以備不去目標(biāo)機(jī)場時(shí)，改降之

destination airport.                                 用。

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英漢對照民用航空詞典                                    BOEING

ALTERNATE AERODROME, An aerodrome to which           備用機(jī)場，

an aircraft may proceed when it becomes either         當(dāng)不可能或不適宜在預(yù)選機(jī)場著陸時(shí)，可作著陸使用的

impossible or inadvisable to proceed to or land at the 機(jī)場。

aerodrome of intended landing.

ALTIMETER SETTING, The adjustment of the altimeter   高度表設(shè)定，

to account for local variations in atmospheric pressure. 根據(jù)當(dāng)?shù)卮髿鈮毫ψ兓�而對高度表所做的調(diào)整。

ALTITUDE ACQUIRE, A digital flight control system    高度截獲，

mode to transition from climb (or descend) to level flight. 一種數(shù)字式飛行操縱系統(tǒng)，從爬升（或下降）改平的模