时间:2011-02-23 15:20来源:蓝天飞行翻译 作者:航空 点击:次
to swing a compass to calibrate com-pass deviation by recording its value on a compass base while rotating the air-craft through 360° 3. . to swing a pro-peller to turn a propeller by hand to start the engine swirl /swl/ noun a movement with a twisting motion . Swirls of smoke came out of the engine. swirl chamber /swl t.e.mb./ noun a small chamber in the cylinder head to promote swirl . The usual method of atomising the fuel is to pass it through a swirl chamber, so converting its pressure energy to kinetic energy. switch /sw.t./ noun a device to open or break an electric current . There is an on/off switch on the front panel. . cen-trifugal switch a switch operated by centrifugal force . verb to connect or disconnect two lines by activating a switch . to switch on to start to provide power to a system by using a switch . Switch on the light. . to switch off to disconnect the power supply to a device or system . Switch off the navigation lights. symbol /s.mb.l/ noun a printed or written sign used to represent some-thing . The work done by an electrical circuit or the power consumed is meas-ured in watts and is given the symbol P. symbolic /s.mb.l.k/ adjective refer- ring to symbols . A symbolic code is used for synoptic charts. symmetric /s.metr.k/, symmetri-cal /s.metr.k(.)l/ adjective referring to something which has an exact like-ness of form on opposite sides of a cen-tral dividing line . The area covered by the forecast is divided into a series of grid or reference points at approxi-mately 300 km (kilometres) symmetrical spacing. symptom /s.mpt.m/ noun a sign or indication of something, possibly a 227 system
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