18/02/11 16:59:16.17 p3ZeDaWx0.net
>>939
難題を解けたとき(解いた後)だと、
I am very excited when I solved a difficult problem.
難題を解くことができる時が楽しいときは
I am very excited when I can solve a difficult problem.
解いている最中が楽しいと
I’m very excited when I’m solving a difficult problem.