Silit
碳硅电阻材料
🗣️ 情景例句
You know, when I was your age,
要知道 ，当我像你这么大的时候，
Teacher. He is teaching.
老师。正在教书。
They had a definite meaning, for they were as near as early man could get to writing.
它们有着一定的含义，因为它们已接近古代人的文字形式。