insistent
adj. 坚持的，坚决要求的；再三的，反复的
例句
The doctor demurred, but Piercey was insistent.
医生表示异议，但是皮尔西坚持不懈。
《柯林斯英汉双解大词典》
They were insistent on having a contract for the work.
他们坚持要就这项工作立一份合同。
《牛津词典》
Why are you so insistent that we leave tonight?
你为什么一定要我们今晚离开？
