n.树液；汁液；精力；易上当的人；地道
v.挖地道；削弱；逐渐耗竭
These bugs drink much sap every day. 这些虫子每天吸食许多树液。
Maple sugar is made from the sap of maple trees. 枫糖是由枫树的树液制成的。
The sap flowed out when he broke the stem of the flower. 他把花茎折断，汁液就流了出来。
It was the beginning of the spring and the sap was rising in the boys. 正当初春季节，勃勃的生气在小伙子们身上奔涌。
They are ventilating the sap of a coal mine. 他们正在使煤矿坑道通风。
用作动词 (v.)The criticism sapped his determination. 批评削弱了他的决心。
I was sapped by months of hospital treatment. 我住院治疗几个月
Her long illness gradually sapped her strength. 长期的患病使她的体力渐渐衰竭。
n.啄木鸟的一种
