Spectrodensitometer
光密度计
🗣️ 情景例句
What's your occupation?
你的职业是什么？
Please sign a copy of our Sales Contract No.156 enclosed here in duplicate and return to us for our file.
请会签第156号销售合同一式两份中的一份，将它寄回我方存档。
Why don't we go to the office now?
为何我们现在不去办公室呢？