在植物弱蒸腾情况下，木质部的水分处于正压状态，这种压力叫根压。

The positive xylem pressure, often occurs with low transpiration rate, is termed as root pressure.

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⊙、胸中没有大目标，一根稻草压断腰； 胸中有了大目标，泰山压顶不弯腰。

Chests are not big goals, a straw that broke the waist;

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⊙、胸中没有大目标，一根稻草压断腰； 胸中有了大目标，泰山压顶不弯腰。

Chests are not big goals, a straw that broke the waist;

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