While I was still cherishing the hope that he might be alive, circumstance beyond my control made it impossible for me to continue work into which I had poured my heart's blood for twenty years.

而我依然抱着他可能存活的希望，倾尽心血苦苦寻找了20年，最终，在无法控制的环境的逼迫下，我放弃了努力。

youdao

Many reasons... Though I'm a person who very much like to be in control of my life, I guess there are many things which is beyond my control at this point of time!

有很多原因…虽然我是那种希望生活都在我掌控中的人，但是我觉得有太多东西不在我的掌控中！

youdao

"I apologise for the inconvenience that my withdrawal may cause but I trust you understand, the situation is beyond my control and I would much rather participate in the tournament than be in the current position regarding my health, " Murray said in a letter to the Shanghai tournament organisers.

BBC: Murray pulls out of Chinese event