During the day water loss by transpiration exceeds water absorption by the roots and leaf water potential decline.
白天蒸腾作用散失的水分超过根系吸收的水分，因而叶子的水势就下降。
2
This is normally closely related to the rate of water loss by transpiration and the potometer can be used to compare transpiration rates under different conditions.
通常与由于蒸腾作用而丧失水分的速率紧密相关，蒸腾计可被用于在不同条件下进行蒸腾速率的比较。
3
JOJOBA OIL GOLDEN GRADEcontrols transpiration water loss (water and moisture loss through skin) and helps to control flaking and dryness of the skin, thereby also helping to fight wrinkles.