重点讲解：
1. of one's own
属于自己的；关于自己的；
eg. You see, we have a problem of our own.
你知道，我们也有自己的问题。
eg. He set out in search of ideas for starting a company of his own.
他开始寻求思路创办自己的公司。
2. on one's deathbed
临终之病榻；
eg. He promised his mother on her deathbed that he would never marry.
他向垂危的母亲保证他绝不结婚。
eg. He forgave her on his deathbed.
他在临终之时原谅了她。
3. be untroubled by
不为所动的；不心烦意乱的；不忧心的；
eg. She is untroubled by the fact that she didn't win.
她并没有为失败而烦心。
eg. He remains confident and seemingly untroubled by our recent problems.
他保持自信，似乎没有被我们新近的问题所困扰。