1．I want to expand my horizons.
  　 我想展我的视野。

　　2．Ive made a tough decision, sir. Here is my resignation.
　　长官，我做了一个很困难的决定。这是我的辞呈。

　　3．I quit because I dont want to be stuck in a rut. I want to move on.
　　我不想陷入窠臼所以才辞职。我希望能向前迈进。

　　4．First of all, Id like to say that Ive really enjoyed working with you. However, I think its about time for me to leave.
　　首先，我要说的是，我真的很高兴能与你共事。但是，我觉得该是我离开的时候了。

　　5．Ive been trying, but I dont think Im up to this job.
　　我一直很努力，但我觉得无法胜任这个工作。

　　6．Ive been here for too long. I want to change my environment.

　　我在这里待太久了。我想转换一下环境。

　　7．Im sorry to bring up my resignation at this moment, but Ive decided to study abroad.
　　我很抱歉在这个时候提出辞呈，但我已经决定要出国念书了。

　　8．To be honest, Ive got a better offer.
　　老实说，我有一个更好的工作机会。

　　9．Im running out of steam. I need to take a break.
　　我精疲力竭了。我需要好好休息。

　　10．Im quitting because I want to try something different.
　　我辞职是因为我想尝试不一样的东西。