The total photosynthetic photon flux density above and below canopy has a significant diurnal and seasonal changes and the changes of the upper and lower canopy are consistent.

冠层上方和下方总的光合光量子通量密度具有明显的日变化和季节变化，并且冠层上下变化规律一致。

youdao

Surely an intelligent designer would have put the rainforest canopy somewhat lower, and saved on tree trunks?

ECONOMIST: The evidence for evolution

The car's wraparound canopy, liposuctioned lower door panels and bluff backside all say, let's hook up.

WSJ: A Bargain-Priced Hatch that's a Kick in the Pants