bypass and core gas streams  旁路和核心流
turbo-fan engine  渦扇發(fā)動(dòng)機(jī) 
flight Mach number   飛行馬赫數(shù)
engine conditions/geometry  發(fā)動(dòng)機(jī)條件/幾何形狀
compressor pressure ratio  (CPR)    壓縮機(jī)壓力比
fan pressure ratio   (FPR)風(fēng)扇壓力比
bypass ratio   （內(nèi)外）涵道比，流量比
fuel-air ratio   燃料-空氣比
fuel consumption   燃料消耗
medium ['mi:di.m]  n. 介質(zhì)，媒體  a. 中間的，中等的
intermediate [int. 'mi:dj.t]  a. 中間的，居中的，中級(jí)的  n. 中間物，仲裁者  v. 調(diào)解，介入
(Example sentences:  Turbofans in civil aircraft are generally divided intro three classifications, based on by-pass ratio: low bypass (1:1), medium bypass (2 or 3:1), and high bypass (4:1 or greater). In a low by-pass engine, the fan and compressor section utilize approximately the same mass airflow, but the fan discharge will generally be slighter greater than that of the compressor. A medium, or intermediate, by-pass engine has an airflow by-pass ratio of between 2:1 and 3:1, and has thrust ratio that is approximately the same as its by-pass ratio.)