Diphthongoidal
準二合元音的
??? 情景例句
Room service. May I help you?
客房服務部，需要我為您效勞嗎？
I think it's going to take at least 2 days.
我認為它將花至少兩天時間。
It's an old film,but it's very good.
這是老部片子，但很好。