二次的

The natural organic macromolecule used in water treatment is nonpoisonous, easily biodegradable, no secondary pollution, wide Raw material sources, and low price advantage.

用于水处理的天然高分子絮凝剂具有无毒、易于生物降解、无二次污染、原料来源广、价格低等优点，近年来得到了重视与应用。

"Mr. Foo is a mysterious Second World War product, gifted with bitter omniscience and sarcasm."

Foo 先生是二次世界大战的神秘产品，专门用来挖苦和讽刺知识份子。

This paper discusses the application of linear quadratic optimal control theory in network PID control system.

讨论了线性二次型最优控制理论在神经网络PID控制系统中的应用。

In Chapter 3, the linear quadratic optimal control problem is researched.

第三部分研究了非线性微分-代数系统的二次指标最优控制问题。

The simulation analysis system of the overlong concrete wall has been developed with UIDL and APDL of ANSYS software which provided re-development tools.

以ANSYS软件为平台，利用其提供的UIDL和APDL等二次开发工具，开发了超长混凝土墙体温度裂缝仿真分析系统。

The proceess of water purification includes fine filtration,ozonization,irradiating of ultraviolet ray, absorption of activated carbon,purifying by mai-fan stone etc.

该机即节省了臭氧，又避免了二次污染，其净化水的过程包括：微细过滤、臭氧氧化、紫外线照射、活性炭吸附、麦饭石净化等。

Oerall, 23 patients were reoperated on without any completion pancreatectomy, 3 rebled, and 3 (11%) died (including 2 with delayed hemorrhage).

总之，23例患者接受了二次手术，但是未行彻底的胰脏切除术；3例有反弹，3例（11％）死亡（包括2例延迟出血）。

Finally on this basis, a new type virtual second parabolic Fresnel lens model is established by Pro/ENGINEER.

最后在此基础上，以Pro／ENGINEER为工具，建立了二次抛物面型菲涅尔透镜的模型。

In this thesis, the parametric finite element quadratic programming method is adopted to analyze the displacement and stress field of the soil in the composite ground.

本文应用参变量有限元二次规划方法对石灰桩复合地基桩周土体的位移场和应力场进行了计算。

Finally, axisymmetrical strain analysis program is work out using FORTRAN90 according to parametric finite element quadratic programming method and some key points about the program are explained.

最后，根据参变量有限元二次规划算法，用Fortran90 语言编制轴对称应变分析程序，对程序编制过程中的几个要点进行说明。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。