adj.受冰川作用侵蚀(或裂碎)的
动词sap的过去式和过去分词.
The sap rises in trees in springtime. 春天树中的汁液向上流动。
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。
Her long illness gradually sapped her strength. 长期的患病使她的体力渐渐衰竭。
