Only the simple aperture sublingual gland is observed. Its shape is horseshoes, and the colour is amber.
舌下腺只有单口舌下腺，呈马蹄铁状，淡黄色。
The structure design and calculation and application of the aperture restrictor with simple structure, easy assembly and reliable usage are introduced.
本文介绍了一种结构简单、安装方便、使用可靠的缝隙节流器的结构、设计计算及应用。
The aperture field distribution of the ring focus antenna is reviewed in view of the energy conservation law, and the simple formula for calculating its radiation pattern is deduced.
该文从能量守恒观点出发，讨论了副面为椭圆的环焦天线的口径场分布，并导出了计算其方向图的简单表达式。
The simple formulae of fast calculating aperture antenna directivity and gain are derived using antenna beamwidths. Applied range of these formulae are analyzed and discussed.
导出了用天线方向图的半功率波束宽度快速计算口径天线方向性系数和增益的简单表达式，分析讨论了这些公式的应用范围。
Through the system optimization, the analysis of aberration and differential thermal, the designed system is simple, light weight, large aperture, long focal, and good temperature adaptability.
该系统具有结构简单、质量轻、口径大、焦距长、失真小以及良好温度适应性等特点。
The results of simulation analysis to single slit, aperture and multi-slits show that this method is a simple and credible way to analyze Fraunhofer diffraction in teaching.
结果显示，该方法思路清晰，结果准确可靠，可作为教学中分析夫琅禾费衍射现象的另一种有效方法。
The results of simulation analysis to single slit, aperture and multi-slits show that this method is a simple and credible way to analyze Fraunhofer diffraction in teaching.
结果显示，该方法思路清晰，结果准确可靠，可作为教学中分析夫琅禾费衍射现象的另一种有效方法。
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