maintaining

动词 maintain:

1. keep in a certain state, position, or activity; e.g., "keep clean"
   同义词：keep, maintain, hold
2. keep in safety and protect from harm, decay, loss, or destruction
   同义词：conserve, preserve, maintain, keep up
3. supply with necessities and support
   同义词：sustain, keep, maintain
4. state categorically
   同义词：assert, asseverate, maintain
5. have and exercise
   同义词：wield, exert, maintain
6. maintain for use and service
   同义词：keep, maintain
7. maintain by writing regular records
   同义词：keep, maintain
8. state or assert
   同义词：maintain, defend
9. support against an opponent
   同义词：uphold, maintain
10. observe correctly or closely
    同义词：observe, keep, maintain

1. 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
2. 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。
3. The capturing of prey as a means of maintaining life.
   捕食为生以捕获猎物作为维持生命的方式
4. How many military bases are they maintaining on foreign soil?
   他们在外国保持多少个军事基地？