In times of economic difficulty, there is no better investment.

She spoke with difficulty, choking back more tears.

她把更多的泪水抽抽噎噎地忍回去,话都讲不上来.

Will cleared his throat and read slowly and with difficulty.

威尔清了清嗓子,缓慢而艰涩地念起来.

Using serum bottle as batch reactors and calcium acetate as substrate, the stimulations of trace metals Fe, Co, Ni on the methanogens were studied. The results showed that a supplement of trace metals to the anaerobic system could effectively shorten the digestion period.

本文以血清瓶为反应器，以醋酸钙为基质，通过厌氧批量试验从动力学的角度研究了微量金属元素Fe、Co、Ni对甲烷菌的激活作用。

At present, we over-focus on stock prices brought about by the loss, in fact, prices of raw materials for Chinese enterprises is a good opportunity is in the throes of inventory digestion period.

目前大家过分关注于存货跌价带来的损失上，其实原料价格暴跌对于中国企业更是一个很好的机会，目前正处于消化存货的阵痛期。

The delignification rates in CML and CC are much faster than those in S all through the digestion period during bamboo NaOH-AQ pulping.

青篱竹烧碱-蒽醌法蒸煮时，在整个蒸煮过程中，CML和CC的脱木素速率稍大干S的脱木素速率。

But owing to over lasting digestion period and less biogas yield in unforced digestion, its economic benefit was reduced in industrialization.

但由于采用自然发酵，周期过长，产气量少，在工业化生产中影响经济效益。

The State made a clear decision to turn all non-state employed teachers into state employed teachers, so the period was called "digestion period".

国度明白划定到20世纪末消化所有及格民办教师，所以把这一段时光称为民办教师的“消化期”。

Installation and Control of Methane Safety Utilization System for Anaerobic Sludge Digestion Process

污泥厌氧消化沼气安全系统的设置及控制研究

The research advance and trend analysis on aerobic sludge digestion

污泥好氧消化的研究现状及发展趋势

Test of sludge digestion process for treatment of printing ink wastewater

利用污泥消化过程处理油墨废水试验

Their crystal structures were usually characterized by the X-ray diffraction instrument.

人们一般常用 X 射线单晶衍射仪表征它的晶体结构.

The recent years, the diffraction grating technology is valued people's day by day.

近些年, 光栅技术日益受到人们的重视.

The crystal structure of the compound has been determined by elemental analysis and X-ray single-crystal diffraction.

并通过元素分析及X - 射线单晶衍射法,测定了该化合物的晶体结构.

It has a unique X-ray diffraction pattern, which identifies it as a new material.

它具有独特的X - 射线衍射图, 这确认它是新型材料.

Effect of Water-soluble Polymer on Bauxite Digestion Residue Settlement

水溶性聚合物在铝土矿浸出渣沉降中的作用

The Effects of Digestion Residue on Watermelon Growth Stimulation and Disease Resistance

厌氧消化物对西瓜的促生抑病作用

Crater-Visible under diffused illumination, a surface imperfection on a wafer that can be distinguished in!

微坑 - 在扩散照明下可见的, 晶圆片表面可区分的缺陷.

Effect of Sewage Sludge Pretreated by Combination of Ultrasonic and Alkaline on Anaerobic Digestion and Residual Heat Utilization

超声和碱联合预处理剩余污泥的厌氧消化及余热利用研究

Alkaline potassium persulfate Digestion Determination of total Nitrogen in Municipal sludge

碱性过硫酸钾消解测定城市污泥中总氮

The Cr(ⅵ) content in chrome tanning agents was determined by the method of alkaline digestion, which could effectively restrain the oxidation and reduction between Cr(ⅲ) and Cr(ⅵ).

采用碱式消解法测定铬鞣剂中的Cr（Ⅵ）含量。该方法能够有效的抑制铬鞣剂中的Cr（Ⅲ）与Cr（Ⅵ）之间的转化。