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
Bye.
再见。
It seems he has a lot of strange ideas.
看起来他好像有很多奇怪意见。
because this is easier to shape than other kinds.
因为燧石较之其他石头更容易成形。