Firstly, how PCF's air-hole structures varied along with the applied fusion power was observed by changing fusion parameters, such as fusion time and current.
方案结合实验测量与理论计算，首先通过改变熔接时间、熔接电流等参量，考察了不同熔接功率对PCF端面气孔结构的影响。
Population demography is the core of the research in population ecology, which mainly deals with changing laws of the population amount along with time and space.
种群统计是种群生态学研究的核心，主要研究种群在时间和空间上的数量变化规律。
The mother image in the modern history of literature is one that has the connotation character image, and is changing along with the time advance and the mainstream words change.
母亲形象是现代文学史上一个颇具内涵的人物形象，并随着时代的前进和主流话语的变化而变化着。
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