bimodal pattern

The bimodal distribution curve of ABA contents in developing rice embryo was consistent with the biphasic pattern of the embryonal development.

发育中稻胚ABA含量的双峰曲线与胚的两阶段发育模式一致。

Daily variation characterizes that black carbon has the bimodal pattern and the peak value appeared at 08:00~ 10:00 and 18:00~ 21:00, which is related closely to the local weather conditions and human activities.

日变化特征为，黑碳浓度呈双峰型分布，峰值分别出现在08：00～10：00和18：00～21：00，这与局地天气特征和人为活动有密切的关系。

As a rule, the female showed a bimodal daily activity pattern ( morning and evening) during the incubation stage.

研究表明：在孵化期，雌鸟的日活动节律呈现出双峰模式，即晨昏活动。