sustained
adjective uk/səˈsteɪnd/ us/səˈsteɪnd/
持续的，持久的
continuing for a long time
The president's speech was greeted by sustained applause. 总统的演讲博得了经久不息的掌声。
坚定的，坚持不懈的
determined
We must make a sustained effort to get this task finished this week. 我们必须坚持不懈，争取在本周完成这项任务。