Thorium decay series
[化] 钍衰变系
🧩 词语组成解析
n. 钍\\n[化] 钍Th
🗣️ 情景例句
Unless in uniform, he doesn't look like a policeman.
除非穿上制服，要不他看起来不像警察。
Better wear out shoes than sheets.
宁可（经常运动）穿破鞋子，也不（因病长卧）磨破床单。
OK.
行。