冠益嗪明显减慢大鼠心率，拮抗异丙肾上腺素的正性变时作用。
The drug markedly slowed the heart rate and antagonized the positive chronotropic effect of isoprenaline.
分析桥梁受力性能时考虑了结构自重、车辆荷载和季节性温变荷载的作用。
Analysis of qualities stress of bridge includes of action of dead load, car load, temperature load of season character.
大气腐蚀是造成钢结构损伤的一个主要因素，并且是随时间渐变的，其可靠性分析属于时变可靠性的范畴，而腐蚀模型在其中起重要的作用。
It varies with time and the reliability analysis considering corrosion is time variant reliability, while the model of the corrosion affects the reliability analysis significantly.
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