以下为句子列表：
英文: Of course, as for the questions in the breakdown of natural science, too uncommon and boring mathematical calculation can influence your activity, therefore I ask interesting and practical questions, such as creatural diesel oil, using of straw, recycle o
中文: 当然，对于自然科学版里的问题，太生僻、枯燥的数学计算会影响大家的积极性，所以我尽量提问有趣的、实用性较强的题目，譬如生物柴油、秸秆利用、白色污染以及垃圾回收、资源昆虫养殖等。
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英文: This article presents a mathematical calculation model of kinematic parameters for the unusual shape beam pumping unit by analyzing its geometry relationship and kinematic characteristics.
中文: 异形游梁式抽油机的游梁后臂有效长度随曲柄转角而变化，故无法利用常规游梁式抽油机的解析方法来计算其运动参数。
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英文: L1NCAR AND UNLIEAR SYSTEMS AND MATHEMATICAL CALCULATION OF PLANT COMMUNITY SUCCESSION
中文: 植物群落演替的线性与非线性系统及数字预测
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