The choice of physics was probably based on the fact that I found it the most difficult and challenging subject, and I still do to this day.

选择物理可能是因为我发现这门功课最难、最具有挑战性。 直到现在我仍然这样认为。

youdao

What was the most difficult one to decide and how did you make your choice?

你作出的最艰难的决定是哪个？如何做的选择？

youdao

City subway is the most effective and perfect choice that solves the great traffic difficult problem.

地铁是解决大城市交通难题最有效、最理想的选择。

youdao

"In the coming weeks, President Barack Obama will make the most difficult choice a commander in chief can face: whether to send more troops into harm's way, " wrote Kerry, the chairman of the Senate Foreign Relations Committee.

CNN: U.S. must win Afghan hearts and minds, commander says

But he added that his decision on whether to grant federal funding for embryonic stem cell research is the most difficult choice he has to make, because of the dilemma between moral issues of creating human embryos to produce stem cells and the promise from doctors and scientists the research will save human lives.

CNN: Bush to visit Kosovo troops

NATO's official goal of repatriation is the best long-term option both for refugees and for other countries, but it is also the most costly and difficult choice for western governments.

ECONOMIST: Exporting misery | The