1) preliminary test
预试
1.
Objective:To study the chemical components in the leaves of carya cathayensis and Carya illinoёnsis nsis by preliminary test.
方法:采用化学成分系统预试法,分别对山核桃叶和美国山核桃叶的水提取液、乙醇提取液和石油醚提取液进行研究,通过多种指示剂和显色剂的颜色反应或沉淀反应,初步推断两种植物叶中可能含有的化学成分。
2) pretesting
[英][pri:'test] [美][pri'tɛst]
预试
1.
The pretesting result indicates that the toxic dosage of pollen polysaccharides is between 2.
预试结果反映花粉多糖的急性毒性剂量介于 2 5～ 5g kg之间。
3) pre-experiment
预试验
1.
Objective To explore the active constituents in different parts from the root,stem and leaf of Zantedeshia aethiopica by pre-experiment.
目的通过预试验,研究马蹄莲根、茎、叶三个部位可能的化学成分,以寻找有效成分的主要存在部位。
2.
Analysis the actuality and teaching reforming contents of pre-experiment in traditional Chinese medicine chemistry course, on the base of the traditional pre-experiment mode, some experiences which deserve popularized are explored.
分析中药化学预试验教学的大致现状和改革后的内容,在中药化学预试验的传统教学模式上,探索了一点值得推广的经验。
3.
Objective:To explore the active constituents in different parts from the root,stem and leaf of Zantedeshia aethiopica by pre-experiment.
目的通过预试验,研究马蹄莲根、茎、叶三个部位可能的化学成分,以寻找有效成分的主要存在部位。
5) pre-commissioning
预试车
1.
In this article, the installation and pre-commissioning procedure as well as control points for the key package extrude system, which serving in the pellet forming and extrusion downstream section within 600,000 T/ y polyethylene plant, were mainly introduced.
主要描述了年产600kt聚乙烯装置的后工段粒料成形及挤出的核心机组挤出机系统的安装及预试车过程和控制要点。
6) pretest
[英][pri:'test] [美][pri'tɛst]
预测试
1.
The EMC Pretest Technology is Forecast to Guarantee the Quality of the Product is Indispensable
EMC的预测试技术是保证产品质量不可少的手段
2.
The characteristic of EMC certification test and EMC pretest were analyzed and the advantages of EMC pretest were summarized.
阐述了电磁兼容性(EMC)和电磁兼容测量的基本概念,通过分析EMC认证测试与EMC预测试的特点,总结了EMC预测试的优点。
补充资料：预试车
分子式：
CAS号：
性质：指竣工以后，化工投料试车之前，在现场为创造化工投料试车条件所进行的工作。它一般包括单机试车、联动试车、机械与管道的内部处理、电气设备与自动控制系统的调校以及催化剂充填等。
CAS号：
性质：指竣工以后，化工投料试车之前，在现场为创造化工投料试车条件所进行的工作。它一般包括单机试车、联动试车、机械与管道的内部处理、电气设备与自动控制系统的调校以及催化剂充填等。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条