结果表明，地膜覆盖在玉米生育中期保水效果明显，而在生育前期和后期保水效果不明显；
The results showed that the film covering had obvious effect on soil water conservation at the middle stage of corn growth, but neither at the earlier, nor later stage was obvious.
文章将危机传播控制划分为前期危机预警、中期危机处理和后期危机调控三个阶段，并提出了一套危机传播控制的基本模型。
The paper divides the crisis spread and control into three phases: crisis prewarning, middle period and crisis handling period.
嵌入式调制解调器的开发，可以分为三大部分：前期分析、中期设计和后期测试。
The research and development of embed modem is composed by three parts:the prophase analyse, the middle design, the anaphase testing.
主要面对电力、电信、银行、保险等行业客户，负责前期解决方案的提出、中期销售活动及后期销售跟踪。
Main facing power, telecom, banking, insurance industries customers, responsible for the prophase solutions proposed, mid sales activities and the late selling tracking.
方法采用“自测健康评定量表(SRHMS v1.0)”对某部241名军人在守礁前期、中期、后期进行现场问卷调查。
Methods Altogether 241 members of the selected troops were investigated by means of self-rated health evaluation scale (SRHMS V1. 0) during the prophase, metaphase, and anaphase of stationing.
在不同覆膜方式及灌水次数下，春玉米的耗水规律表现为生育前期少、中期多、后期略少的变化趋势。
Maize's water consumption rule performance for the birth earlier period few, the intermediate stage are spring many, the later period slightly few changes tendency.
研究表明，棉花干物质积累量前期积累少且慢、中期增多且加快、后期缓慢增加的趋势。
Studies have showed that dry matter accumulation of cotton were short and slow in the growth of perhaps, it increased fast in the medium-term and slowly increased in the latter.
高钙处理时钙的吸收集中于生育中期和后期，低钙和不施钙处理时钙的吸收集中于生育前期和中期。
The absorption to Ca was mainly concentrated on the middle stage and the late stage of growth under a high level of Ca.
历经前期环境教育的起步、中期环境教育的探索、后期环境教育的持续深化，现已进一步演化成为当代的绿色教育。
The initialization of earlier environmental education became the midterm exploration of environmental education and the continued deepening in anaphase.
不同生育期氮素处理对根量的影响以前期最大、中期次之、后期最小；
The effects of nitrogen on root amount decreased in order of early, mid-dle and late treatment;
不同生育期氮素处理对根量的影响以前期最大、中期次之、后期最小；
The effects of nitrogen on root amount decreased in order of early, mid-dle and late treatment;
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