✔ 最佳答案
要看情境。如果對方是問你可否幫他忙時,你回應No problem,則是表示「沒問題」或「當然可以」。
在對方請你原諒他時,你說no problem才是「沒關係」。
You say "no problem" to show that you are willing to do what you have been asked. (口語用法)
You say "no problem" to let someone know that you do not mind them doing something they have said they are going to do.(口語用法,准許他人的要求)