Spectrodensitometer
光密度计
🗣️ 情景例句
I appreciate it very much.
我非常感激你的帮助。
As soon as he comes, we'll let him know.
他一来，我们就告诉他。
I can't find it. There are just a few loose coins at the back of the drawer.
我也找不到。在抽屉底只有一些零散的钱币。