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。
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