Water surges from the cells on the inside of the leaf to those on the outside, causing the leaf to rapidly flip in shape from convex to concave, like a soft contact lens.

水从叶子内部的细胞涌向外面的细胞，导致叶子迅速地从凸向凹翻转，就像一片柔软的隐形眼镜。

youdao

youdao

youdao

For hydration, there is water flavored with pandanus leaf, which tastes pleasantly of toasted rice, and fruit-flavored drinking vinegars, which, mixed with seltzer, are like sweet-and-sour sodas.

NEWYORKER: Pok Pok Ny

The density of water molecules within the leaf is typically 60 times greater than the density of carbon dioxide in the air, and the diffusion rate of the water molecule is greater than that of the carbon-dioxide molecule.

WSJ: Harrison H. Schmitt and William Happer: In Defense of Carbon Dioxide

So depending on the relative humidity and temperature, 100 or more water molecules diffuse out of the leaf for every molecule of carbon dioxide that diffuses in.

WSJ: Harrison H. Schmitt and William Happer: In Defense of Carbon Dioxide