因此，当瓜类植物的根在雨水浸湿的土壤中时，它们的光合作用率低于通常水平。
It follows that melon plants have a lower-than-usual rate of photosynthesis when their roots are in rain-soaked soil.
喜阴的植物比起喜阳的植物有着更低的光合作用率，因此有着更低的生长速度。
Shade-tolerant plants have lower photosynthetic rates and hence have lower growth rates than those of shade-intolerant species.
喜阴的植物比起喜阳的植物有着更低的光合作用率，因此有着更低的生长速度。
Shade-tolerant plants have lower photosynthetic rates and hence have lower growth rates than those of shade-intolerant species.
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