查询词典 poor

Any grass of the genus Chloris; occurs in short grassland especially on waste ground or poor soils.

虎尾草属的任何一种草；出现在矮草原尤其在荒原或土壤贫瘠地区。

In my opinion, Cu complexes with unsaturated alcohol to form a complex compound; the nitrogenous compound introduced serves as the complex compound's stabilizing agent and reduces activation energy of reaction; TMPO serves as oxygen carrier and displays it's selective oxidation function. This new method and mechanism also demonstrates significance to other similar organic reactions.3 In the chlorohydrin reaction, NaCIO is replaced by Ca2see Chapter4.4.3.4(2 .A, this method hasn't been reported in previous literature,which exerts more buffer action to the react system, the yield increased from 52% to 88.6%; at the same time it solve the problem of poor stability and low percentage composition of NaCIO.

认为：CuD与烯醇形成络合物：含氮有机物的引入起到稳定络合物，降低活化能的作用：而TMPO则充当携氧子起传递氧的作用，并具有选择氧化功能：这种新的方法和理论对类似的反应(不饱和醇类在络合体系下选择性催化氧化为对应的醛也具有重要的指导作用。3在异戊二烯的氯醇化反应中，用次氯酸钙代替次氯酸钠见第4章4.3.4(2.A，本方法未见文献报道，使反应系统更加温和，收率由52%提高到88.6%：并解决了次氯酸钠稳定性差、有效氯含量低的实际问题，具有重要的实用意义。

The results indicated that 00Cr18Nil4Mo2Cu2 and 1Cr18Ni9Ti had poor corrosion resisting property, however, 00Cr25Ni22Mo4.5Cu and TA2 had good corrosion resisting property and were ideal material in Chloromethane production system.

选用了目前耐还原性腐蚀介质较好的几种工业材料，模拟现场的生产条件

Frequently,crop plants do not take up adequate amounts of iron from the soil,leading to chlorosis,poor yield and decreased nutritional quality.

农作物经常不能从土壤中吸收充足的铁营养以供正常生长的需求，从而导致失绿症、产量降低和营养品质下降。

All three of the sets of proposals are absolutely chock full of poor assumptions.

三套总统竞选阵营提出的政策建议的前提假设都是经不起推敲的。

If you are like any consumer with good credit, or even with poor credit, your mailbox is probably chock full of solitications from credit card companies.

如果你是像任何消费与良好的信誉，甚至穷人信贷，可能是您的邮箱座充满solitications来自信用卡公司。

I started making speeches, trying to raise money for kids in Alabama's achingly poor Choctaw County.

于是我开始做演讲，努力为亚拉巴马州赤贫的查克托县的孩子们筹资。

Not only is it very easy to take the risk and make a poor choice in this area, but the consequences are great.

不但很容易冒险，在这方面做出一个差选择，而且后果是巨大的。

If the power choke coil suffered mechanical stress such as drop, may become poor (due to damage on coilbobbin,ets),never use such stressed power choke coil.

如果该线圈经受诸如跌落等机械应力时，它的特性可能会变弱，不可再使用受损的线圈。

If the power choke coil sufferedmechanical stress such as drop, may become poor (due to damage on coilbobbin,ets),never use such stressed powerchoke coil.

如果该线圈经受诸如跌落等机械应力时，它的特性可能会变弱，不可再使用受损的线圈。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。