半个世纪以来，男性不育患者的比例有升高趋势，但其病因和发病机制仍未完全阐明。
In recent half century, the incidence of male infertility is in an increasing tendency; however, the etiological factors and its pathogenesis are not fully clarified yet.
结果（1）从正常绒毛→良性葡萄胎→恶性葡萄胎，MMP-2的阳性率有升高趋势，差异有统计学意义（P〈0.05）。
Results : ( 1 ) The positive expression of MMP - 2 reinforces gradually from normal villus, benign mole to malignant mole which has statistically significance ( P < 0. 05 ).
i角误差的大小和稳定是保证水准测量精度的一个重要条件，在实际观测中发现，DiNi 12数字水准仪的i角误差不稳定，有随温度的升高而变化的趋势。
It is discovered in the actual observations that the Angle I error of DiNi12 Digital Leveller is unstable and changeable and has the trend of changing with the rise of temperature.
无论在隔绝蒸发还是在自然蒸发条件下，短期内土壤水吸力有随土层深度的增加呈先下降后升高的趋势，而同一深度土层水吸力则随时间的推移而升高；
Regardless of preventing evaporation or not, soil water suction decreased firstly and then increased with the increase of soil depth, and soil water suction at the same depth increased with time.
结果表明，水产品中镉污染严重，且有逐年升高的趋势，其他各类食品的超标率有逐年降低的趋势。
The results indicated that the Cd pollution condition was severe in the fishery products, which were increased year by year, and the fraction defective rate of other foods were degraded.
挤出温度升高，压力振荡频率减小，周期变大，外推滑移长度有变小趋势。
When the extrusion temperature was increased, the pressure vibration frequency and critical slid length decreased, while the vibration period increased.
甲、乙肝阳性率有随着年龄增长而升高的趋势；
The standardized prevalence rate of hepatitis A and Bincrease with the age.
结论广州地区存在NLV引起的散发和暴发性非菌性胃肠炎，当地儿童在婴幼儿期即获得NLV感染，感染率有随年龄增加而升高的趋势。
Conclusions Sporadic and fulminant NLV infections are present in Guangzhou. The children have the infection in their infancy, and the infection rate increases sharply with age.
高收入家庭的少年儿童肥胖率显著高于中低收入家庭的少年儿童，肥胖发生率有随家庭经济收入增加而升高的趋势。
The obesity rate of children in higher income family was significantly increased than those in lower income family, which had the trend of elevation with the increase of family income.
研究背景及目的：恶性肿瘤发病率有逐年升高趋势，因肿瘤病故居儿童死因第二位。
Background and objective: the incidence of malignant tumors has increased gradually, which becomes the second causation of children death now.
从发病趋势来看，只有白细胞降低的发生率随着疗程有升高的趋势，其他不良反应发生率都呈下降趋势。
From the trend of the adverse reaction, only the incidence of leukopenia increases with the treatment duration, other adverse reactions presents a downward trend.
但随固溶温度的升高，时效后复合材料的硬度的提高幅度有下降趋势。
In addition, the hardness of the composite after aging decreases with the increase of solution temperature.
背景：原发性肝癌目前仍是严重危害人类生命健康的重大疾病，其发病率及死亡率有逐步升高的趋势。
Background: primary liver cancer (PHC) is one of the most common primary liver tumor and one of the most common cause of cancer-related death worldwide.
背景：原发性肝癌目前仍是严重危害人类生命健康的重大疾病，其发病率及死亡率有逐步升高的趋势。
Background: primary liver cancer (PHC) is one of the most common primary liver tumor and one of the most common cause of cancer-related death worldwide.
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