Ecosystems thus involve the circulation, transformation, and accumulation of energy and matter through the medium of living things and their activities.

因此，生态系统以生物及其活动作为媒介，涉及能量和物质的循环、转化和积累。

The experiments were made to investigate the possibility of improving fermentation efficiency through ameliorating medium transfer by fermentation liquid circulation.

本文通过试验，研究发酵液循环促进互花米草沼气发酵过程中介质传递，提升发酵效率的可能性。

In addition, working medium can form natural circulation when power is failed, thus the safety and reliability of boiler operation can be improved.

并且能使锅炉工质在停电状态下产生自然循环，从而提高锅炉运行的可靠性和安全性。

This also permits circulation of a flushing medium around the plug.

这也允许围绕阀塞的冲刷流体介质的循环。

The blood circulation of the fingers was rebuilt by releasing blood from lateral incisions, administration heparin with minimal to medium dose and blood filling of the medullary cavity.

采用侧切口放血结合中小剂量肝素化治疗及髓腔通血方法建立血液循环。

The process technology of manufacturing potassium dihydrogen phosphate by double decomposition with wet - process phosphoric acid purified by reaction medium circulation was introduced in this paper.

介绍了三聚氰胺反应媒循环法净化湿法磷酸复分解生产磷酸二氢钾的工艺技术，对由两种不同原料出发的工艺路线所得的产品进行了成本比较。

The circulating recovery ground flow can reuse circulation medium, especially for nitrogen and natural gas, the corresponding cost, risk and the extent of environment poll...

可循环回收地面流程能够将循环介质，特别是氮气和天然气重复再利用，能够大大节约成本，减少环境污染，降低风险。

Driven up by demand for purchases in the Spring Festival and medium and high-end commodities as well as promotion activities, sales of large circulation enterprises kept steady growth.

在年货和中高档商品需求的带动以及企业促销作用下，大型流通企业销售保持稳定。

Generally forced convection circulation heating device taking gas as heat transmission medium requires high temperature uniformity. So it is very important for selection of fans and control method.

对温度均匀性要求较高的电热设备，通常采用强制循环对流的加热方式，因此风机的选型及控制对能否达到要求的温度均匀性至关重要。

The thermal transfer medium is delivered to the circuit by means of a circulation pump via the heater unit and through the consumer units.

载热介质由循环泵传送，通过加热器再到消耗器进行循环。

Because of its unique advantages, the network medium has enabled the traditional media to face a grave challenge resulting in the drop of circulation, advertisement diversion and revenue reduction.

网络媒体因其独特的优势，使传统媒体面临严峻的挑战，发行下降，广告分流，收入减少。

The method of design of arbitrary cany counter of unnatural sequence circulation by use of medium - scale counter core is discussed. It finds wide application in the special circulation counter.

探讨利用中规模计数器芯片设计按非自然顺序循环的任意进制计数器方法，该方法在特殊循环计数器设计的应用中，有着广泛的应用。

The abnormality of the atmospheric circulation may affect significantly the change of the short and medium range weather.

大气环流异常对中短期天气变化有着重要影响。