The recession may have boosted this trend, he says, but it was not its primary cause.

As is often the case, humans are the primary cause of extinction.

通常情况下, 人类是物种灭绝的主要原因.

This traffic accident primary cause is as a result of pilot's careless.

这次交通事故主要原因是由于驾驶员的粗心.

Against these defects, this paper presents and develops a new high-speed moisture analyzer with PWM controlling the power of microwave drying, introduces the measuring principle, hardware structure, microwave drying mechanism and microwave power controlling method.

为此，本文提出并研制了一种基于PWM微波干燥功率调节控制的新型水分快速测定仪，介绍了仪器的测量原理、硬件结构、微波干燥机理与微波功率控制方法。

At first three phases which are preheating stage, pressure lifting stage and constant-speed drying stage, the instrument calculates the optimal microwave drying power according to the sample's type and initial mass.

仪器根据被测试样的种类和初始质量，计算试样在预热、压力升高、恒速干燥阶段的最佳微波干燥功率；

Contraction in volume and quality structure was the product quality evaluation system. Affect product quality factors include: freeze drying time, microwave power, vacuum degrees and heating time.

以体积收缩率、质构为产品质量的评价体系，确定了影响产品质量的因素为：冻干时间、微波功率、真空度和加热时间等。

Selecting the higher hot air temperature is the first-line in the certain reasonable limits in order to improve the drying speed and reduce power consumption.

为了提高干燥速度和降低能耗，在一定合理的范围内，干燥时首先还是要选取较高的干燥温度。

A rapid measurement instrument of coal moisture controlled by single-chip is introduced in this paper. The microwave drying principle, power control, hardware structure and work flow of the instrument are also introduced.

从仪器的微波干燥原理、微波干燥功率控制、硬件结构及工作流程等方面，介绍了一种采用单片机控制的微波干燥水分的测试仪。

When design the hardware part, it mainly designs from hydrophobic module, module air-dried, the drying module, power module and display module.

在对硬件部分进行设计时，主要是从疏水模块、风干模块、烘干模块、电源模块以及显示模块来进行设计的。

Variable-Pressure Method for Vacuum Drying of Power Transformer

电力变压器变压法真空干燥技术

Electric Design and Keeping Warm Design of Drying Room& A Discussion

浅谈电热干燥室的电气设计与保温设计

Characteristic factors and test method of heat transfer performance of drying room structure

干燥系统室体结构传热特征参数及其试验方法

Research on Automatic Control System of Zanthoxylum Drying Room Temperature Based on Fuzzy-PID

基于模糊PID的花椒烘房温度自动控制系统的研究

Design of Temperature Automatic Control System for Zanthoxylum Drying Room Based on ARM

基于ARM的花椒烘房温度自动控制系统设计

Drying Shrinkage and Autogenous Shrinkage Experimental Research of High Performance Concrete

高性能混凝土的干燥收缩和自生收缩试验研究

Experimental Study on New Block Wall Material Monomer Drying Shrinkage Characteristics

新型块体墙材单体干燥收缩特征试验化学干燥剂化学干燥器

The cold resistance and the water permeability resistance of the recycled coarse aggregate concrete were also test. The principle and the influencing factors of the drying shrinkage, the freeze thaw action and the water permeation action of the recycled coarse aggregate concrete were briefly narrated.

还测试了再生粗骨料混凝土的抗冻性和抗渗性，简要叙述了再生粗骨料混凝土干缩变形、冻融作用、渗透作用的机理以及影响因素。

Experimental study on moisture expansion and drying shrinkage of wall filled with small concrete hollow block

混凝土小型空心砌块填充墙湿胀干缩的试验研究

At the same time, the typical layouts for natural drying and manual drying of gypsumblock production lines are put forward.

提出了石膏砌块分别采用自然干燥和人工干燥生产线的典型工艺布置方案。

INVESTIGATION ON THE BEST CONDITIONS FOR NATURAL DRYING PADDY(ⅰ)── Analyzing the influences of drying conditions on paddy from heat energy use efficiency

稻谷自然干燥最佳条件的探讨（Ⅰ）&从热能利用效率分析干燥条件对稻谷的影响

The shrinkage of the specimens in airtight curing condition and natural drying condition were measured continuously.

当养护环境由密闭养护变为自然干燥养护时，收缩速率会突然增大，成为产生干缩裂缝的危险期。