Photosedimentometer
光透式粒度测定仪
🗣️ 情景例句
Make sure you file this invoice straight away; I don't want it being misplaced.
记得现在就把发票给开了，我可不想弄错了。
First of all, I will outline the characteristics of our product.
首先我将简略说明我们商品的特性。
Is this one better?
这种更好些吧？