类

The hydroxyl groups can be changed into esters,ethers,acetals and ketals,etc.

最常用的羟基保护基主要有三大类：酯类、醚类和缩醛或缩酮类。

The combined technique of GC/MS was used to analyze the out water. The results showed that the activated bacteria could can degrade the hard degradation organism, such as esters, aldehyde, alcohols, alkanets and so on.

通过GC/MS联用技术对焦化废水出水的水样分析，可以发现该活性细菌在培养条件下能部分降解酯类、醛类、醇类、烷烃类等难降解有机化合物。

It is according to this model that standard radiant sources, here called the blackbody sources of the first kind, are built up in practise. In this paper, the concept of blackbody sources of the second kind is presented for the first time.

在集总参数下建立了联系第一类和第二类黑体辐射源物理模型的理论公式，并在此基础上论证了第一类和第二类黑体辐射源之间一致的内在联系。

This paper reviewed the physiological responses to the toxicity of heavy metals and the accumulation of metals in copepods, in addition of trophic transfer.

综述了近20a来重金属对桡足类影响的研究进展，包括重金属对桡足类的毒性和生理效应，重金属在桡足类体内蓄积及桡足类体内重金属的食物链传递。

Echinoderms:Echinoids,Crinoids,Asteroids,Ophiuroids,Holothuroids Sea Cucumbers

棘皮动物：（海胆类动物，海百合类动物，海星状动物，海蛇尾类动物，海参类动物

The upper bound of error probability is used as the criteria of clustering and the evaluation of the clustering result. On the basis of initiatory clustering based on distance functions, the algorithms named"pick-over"and"fill-up"are proposed to minimize the upper bound of error probability.

我们将聚类准则即模式相似性测度问题和聚类结果的评价指标统一为总的最小错误概率上界，在算法实现上，首先先用基于距离函数的聚类方法得到初分类，然后采用基于最小错误概率的&抽取&和&回填&算法得到使总的错误概率上界最小的聚类结果的分析方法。

The relationship between biomass and succession gradient also showed unimodel pattern: y=-8.7647χ^2+86.696χ+67.14 (R^2=0.6164). As for functional groups of life form, annual plants showed decreasing trend in the community, perennial grass showed increasing tendency, while sedges and perennial forbs both showed increasing tendency, in which the increasing extend for sedges slowly and for grasses sharply.

一年生植物在群落中的数量呈下降趋势；禾本科植物在群落中的数量呈上升趋势；莎草类及杂类草植物在群落中的数量均呈增加趋势，但莎草类植物增幅不大，而杂类草植物则急剧增加。

The results showed that 1 There are 33 kinds of pyrolysates at 300℃. 42 kinds at 421℃, 50 kinds at 500℃, 49 kinds at 600℃ and 23 kinds at 800℃ 2 Under different conditions, the pyrolysates from the extraction of Honeysuckle are aldehycies. ketones, esters and furans. Most of the pyrolysates are the important components in cigarette smoke. It offers a possibility of the quality control on the extraction of Honeysuckle by using its fingerprint.

结果表明：①金银花提取物在这一系列裂解温度下检测到的挥发性热裂解产物分别为33种、41种、50种、49种、23种；②金银花提取物裂解后产生大量醛类、酮类、酯类和呋喃类物质，这些物质是构成卷烟香味的重要物质，能改善卷烟吸味、减轻刺激性。

The extensive investigation and fixed point observation on germplasm resources of Ginkgo were conducted in Auckland, Wellington, Hamilton, Hastings of New Zealand, the results show that there are only four types of nut of Ginkgo biloba, i. e. Meihe, Fozhi, Maling, Yuanzi.

通过对新西兰的Auckland，Wellington，Hamilton，Hastings等主要城市的银杏种质资源进行广泛调查和定点观测，结果只发现有梅核类、佛指类、马铃类、园子类等四种类型。

The deep-seated xenoliths entrained by the Cenozoic Hannuoba basalts can be divided into three groups according to their mineral assemblages:Ⅰ Granulites, including felsic granulites, noritic granulites, and dominantly, two-pyroxene granulites,Ⅱ Pyroxenites, including websterites, spinel pyroxenites, and garnet pyroxenites;Ⅲ Peridotites, including spinel lherzolites and spinelgarnet lherzolites.

根据新生代汉诺坝玄武岩中深源岩石捕掳体的矿物组合类型，将其分为主要的三大类：麻粒岩类中包括长英质麻粒岩、苏长质麻粒岩和二辉麻粒岩，辉石岩类包括二辉石岩、尖晶石辉石岩和石榴子石辉石岩，橄榄岩类则包括尖晶石二辉橄榄岩和尖晶石-石榴子石二辉橄榄岩。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。