Evidence has been mixed on echinacea, a purple flowering plant long thought to help shorten the duration of colds.
紫锥菊的疗效参差不齐，这种植物长久以来被人认为有助于缩短感冒持续时间。
Compared with SM25, both K absorptive capacity by roots after flowering and total K absorptive capacity in grain at maturity duration of ty 1 were much higher.
通油1号开花后根系钾素吸收量和成熟期子粒钾素吸收总量明显高于四密25。
The respose was not caused by the effects of temperature, photosynthetic duration or pre-flowering photoperiodic after-effect but was typical photoperiodism.
这种反应属于典型的光周期现象，而不是由温度的替代作用、光合时间的改变或前期短日后效应引起的。
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