adj.维护保养的
v.保持，保养，坚持（动词maintain的现在分词）
The science and art of cultivating, maintaining, and developing forests. 森林学有关耕种、养护和发展森林的科学和艺术
The maintaining of one vice costs more than ten virtues. 保持一桩恶事的代价超过于十件好事。
How many military bases are they maintaining on foreign soil? 他们在外国保持多少个军事基地？
