I'm very tenacious... and I don't give up.

我似乎很顽固…………但我并没有放弃。

youdao

There is no denying that they played well, very tenacious.

不可否认，他们打得很好，很顽强。

youdao

Throughout China's very long history there has been a persistent theme of continuity and change - the former very tenacious, but the latter sometimes very drastic.

在中国漫长的历史中，一个永恒的主题是持续和变化——前者的力量很顽固，但后者有时非常激烈。

youdao

As I wrote last year, Isentress was a very difficult drug to develop, requiring more than a decade of tenacious advocacy on the part of a Merck scientist named Daria Hazuda.

FORBES: An Innovator's Dilemma For Merck AIDS Drug