Tannalum
鞣酸鋁
??? 情景例句
Thank you, Grandpa.
謝謝你， 爺爺。
The little boy left home for his first day at school.
那個小孩第一天離開家去上學。
You can enlarge your knowledge and learn some English at the same time.
你可以擴大你的知識面，同時又學習了英語。