Unitane
二氧化鈦
??? 情景例句
I remember your parents' first house very well.
我還清楚記得你父母的第一棟房子。
Have you been busy with schoolwork?
學校的功課很忙嗎？
it has to develop (partly by means of touch) the ability to judge roughly three-dimensonal distances.
兒童必須發展（部分通過觸覺）粗略判斷三維空間距離的能力。