Actinometry
n. 辐射测量学\\n[化] 曝光测定; 光能测定学; 光化线强度测定
🗣️ 情景例句
It's a good investment.
这是一项好投资。
Just made it.
末班车。
I'm afraid he's out. He won't be back until tomorrow.
对不起，他外出去了，明天才回来。