n. (c./u.)名詞 (可數/不可數)問題;難題The problem she faces now is how to pay back all her student loans
adj.形容詞問題的She is a problem child, she often breaks things
n. (c./u.)名詞 (可數/不可數)數學習題I do not understand how to solve this problem
n. (c./u.)名詞 (可數/不可數)電腦問題There's a problem with the network connection.
n. (c./u.)名詞 (可數/不可數)難搞的人My son is a problem, he never listens to me