摘要：Research on term travels transcends the scope of the single discipline of historical semantics,and should be included in the transdisciplinary area of discourse studies,as such travels are discursive events in history that have both a linguistic and a social *** other words,the travel of terms across cultures should be treated as discourses in history,and the three-fold nature of the concept of“discourse”sheds light upon the building of a model for diachronic analyses of such processes,which helps discourse analysts sharing the same goal work together to draw more scholarly attention to academic issues at the crossroads of history,language,and society.

摘要：LTE (Long term Evolution) is the latest technology in wireless communication. It is being used because of its peak data rate and spectral efficiency. LTE uses OFDMA (Orthogonal Frequency Division Multiple Access) technology for radio transmission and reception in downlink. OFDM is a multicarrier modulation and multiplexing technique to improve data rate, spectral efficiency and minimize the problem of fading and ISI (Inter Symbol Interference). Many transceivers design have been designed for OFDM system to minimize error and maximize throughput of the information being transmitted and received at the system. The purpose of this article is to present a survey of the published literature which deals with various OFDM transceiver design, focusing on the merits and demerits of the corresponding OFDM transceiver design.

摘要：在英语中，ｂｅｆｏｒｅ是一种常见的从属连词。它可用来引导一个时间状语从句，其语法功能虽然简单，但由于英汉语言表达的习惯不同，当把它用在不同的语言情景或不同的句子中时，其汉译也可以是多种多样的。现将ｂｅｆｏｒｅ作从属连词的几种译法列举如下，仅供读者参考...