选用方向性好、增益高、旁瓣低的角形反射器天线作为本论文的研究重点。
The emphasis in this paper was corner reflector antenna with high-gain, narrow beam and low side-lobe.
作为项目的一部分，本论文的侧重点主要是对超声波在灾害现场生命搜救中的应用进行研究。
As a part of the project, this paper is mainly focused on the application study of ultrasonic life detector after disaster.
本论文以拒绝言语行为作为研究的重点，作者把它定义为对说话者指令类行为的拒绝行为。
This thesis focuses on the speech act of refusal which the writer defines as the refusing act to the speakers 'directives.
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