Pertechnetate
高锝酸盐
🗣️ 情景例句
Can't you make it a little cheaper?
你不能算便宜一点？
How come?
怎么会这样？
He usually takes a short walk in the evenings and is always home by seven o'clock.
傍晚常常出去溜达一会儿，并且总是在7点钟以前回来。