1)  three-stage sampling
三级采样
2)  three-level
三级
1.
In this paper from three aspects, we discuss the structure of the three-level absolute continuous that are derivation,integration and resolution of convex function.
从导数、积分及凸函数分解3方面讨论了三级绝对连续函数的结构，给出了一些特性。
3)  third-order sequence
三级层序
1.
Based on sequence stratigraphy theory and method,and the comprehensive analysis of cores,seismic and logging data,the depo-sitional filling styles of Palaeogene rifting period in Yuanyanggou area of west Liaohe Depression were divided into 4 second-order sequences and 8 third-order sequences.
运用层序地层学的理论与方法,综合分析岩心、测井以及地震等资料,将辽河坳陷西部凹陷鸳鸯沟地区古近系裂陷期的沉积充填划分为4个超层序和8个三级层序。
2.
The depression stage of the Yaojia Formation in the northern SongLiao Basin can be divided into 2 second-order sequences and 13 third-order sequences.
以横跨松辽盆地北部东西向大剖面为例,综合应用钻井岩芯、测井曲线、古生物和地震资料,进行松辽盆地北部坳陷期(早白垩世晚期—晚白垩世)湖盆层序地层学研究,共识别出2个二级层序界面和13个三级层序界面,划分出2个二级层序和13个三级层序。
3.
According to sequence stratigraphy,on the basis of integrated study on outcrop,well drilling,well logging and seismic data,one third-order sequence has been recognized in the Yijianfang Formation.
依据层序地层学理论,通过露头、钻井、测井及地震资料的综合研究,将一间房组划分为一个三级层序;高水位体系域晚期至少划分出5个高频层序,并刻划了三级层序及高频层序单元滩相展布。
4)  three-stage neutralization
三级中和
1.
Study and application of three-stage neutralization waste water treatment technology;
三级中和污水处理技术的研究与应用
2.
For the fact that the scrubbing water for purification of flue gas from the sulfuric acid production with zinc,copper smelter flue gas shows a strong acidity,and contains a large amount of zinc,copper,lead,cadmium,arsenic,mercury and other impurities,a three-stage neutralization process involving neutralization with lime followed by sulfurizing treatment is adopted,which has achieved good effect.
针对锌、铜冶炼烟气制酸烟气净化洗涤水酸性强,且含有大量的锌、铜、铅、镉、砷、汞等污染物,采用石灰中和再硫化处理的三级中和工艺,取得了较好的效果。
5)  tertiary treatment
三级处理
1.
A combined technology of 'tertiary treatment - ecological purification - in situ remediation' was proposed to reutilize the secondary treatment effluent with assured water quality and ecological safety of the urban rivers.
通过对相关案例和水质标准的分析,阐述深度处理和生态净化对污水景观河道回用的重要意义;提出改善回灌河道水质和确保生态安全的城市污水“三级处理+生态净化+河道修复”工艺;以宁波市南区污水处理厂污水再生回用工程工艺设计为例,从河道水体现状、再生水水质水量、投资与效益及配套保障措施等方面,探讨采用该工艺进行城市污水尾水再生和景观河道回灌,实现生态环境利用的技术经济可行性。
2.
The miscellaneous wastewater (800 m 3/d) fr om Taipei International Financial Mansion, after treated by secondary treatment an d tertiary treatment such as sand filtration, activated carbon adsorption, and s oftening, was gathered together with the rainwater (100 m 3/d) treated by physi co-chemical treatment and sand filtration, and then flowed into the reclaimed w ater system.
台北市国际金融大厦将其产生的杂排水(800m3/d)经过二级处理及砂滤、活性炭吸附、软化等三级处理后与经物化、砂滤处理的雨水(100m3/d)汇集,进入中水处理系统。
6)  tertiary alcohols
三级醇
参考词条
补充资料：串级冲击式采样器(cascade impact sampler)
分子式：
CAS号：

性质：又称串级冲击式采样器(cascade impact sampler)。采集大气中不同粒度颗粒物的采样器。目前常用的有按颗粒物粒径大小分为9级(即9个粒径范围)的和5级的；前者称为安德逊(Anderson)分级采样器，后者称为安德逊大容量分级采样器。它们都是采用串级冲击(cascade impact)的原理设计而成的颗粒粒度分离装置，加上动力抽气泵组成。此外还有双分道采样器(dichromatomous sampler)可采集空气中小于15μm的颗粒物(称可吸入颗粒物)，并分成粗粒(2.5～15μm)和细粒(<2.5μm)两种。分级采样器收集的不同粒度颗粒物，可研究其中所含的化学物质和形貌的差异等，这些信息可作为鉴别污染来源、控制可吸入有害物质的重要依据。

说明：补充资料仅用于学习参考，请勿用于其它任何用途。