Radiochemicals
放射化學試劑(藥品)
??? 情景例句
Remembering the past was his only ple4asure.
回憶往事是他唯一的樂趣。
Do you know what the population of Japan is?
你知道日本的人口是多少嗎？
This is a picture of my family at home.
這是我們全家在家里照的一張照片。