| 单词 | carrier |
| 释义 | carrier [`kar·ē·ǝr] CHEMISTRY A substance that, when associated with a trace of another substance, will carry the trace with it through a chemical or physical process. COMMUNICATIONS 1. The radio wave produced by a transmitter when there is no modulating signal, or any other wave, recurring series of pulses, or direct current capable of being modulated. Also known as carrier wave; signal carrier. 2. A wave generated locally at a receiver that, when combined with the sidebands of a suppressed-carrier transmission in a suitable detector, produces the modulating wave. 3. See <<carrier system>> GENETICS An individual who is heterozygous for a recessive gene. IMMUNOLOGY A protein to which a hapten becomes attached, thereby rendering the hapten immunogenic. MECHANICAL ENGINEERING Any machine for transporting materials or people. MEDICINE A person who harbors and eliminates an infectious agent and so transmits it to others, but who may not show signs of the disease. NAVAL ARCHITECTURE See <<aircraft carrier>> |
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