Never let the waterlevel fall below the base of the tree or the cut end may seal over, preventing further waterintake.
不要让水位降到树基以下，或者树干截面以下，否则截面干涸以后，松树就无法充足的吸收水分了。
2
A small hole drilled in the filter intake just below waterlevel will prevent accidental syphoning.
在滤器水位以下的入口上钻一个小洞就可以防止意外漏水。
3
In recent years, U. S. marathons have experienced participant deaths due to excessive intake of water, which can lead to an abnormally low level of sodium in the blood, or hyponatremia.