The operational height of the combine header was adjusted by mechanical profiling organization or manually, which had less accuracy and limited real time, and shortage of acquiring and analyses data.

传统联合收割机割台利用机械仿形机构或人工方法来调整工作高度，其实时性和准确性较差，且不能进行割台高度数据的获取和分析。

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The experiment shows that the minimum spouting velocity was related to the particle sizes, bed height, and operational temperatures.

实验表明，双喷嘴矩形喷动床的最小喷动速度与颗粒粒径、床层高度及操作温度有关。

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Playing mahjong is a technology, from theoretical height, including operational research, logic, probability theory, arrangement study, etc., also including larded humanities.

打麻将是一门技术，从理论高度讲，包括运筹学，逻辑学，概率论，组合排列学等，还包括厚黑学等人文科学。

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