Radioindicator
[化] 放射性指示剂
🗣️ 情景例句
The main course: steak and potatoes.
主菜 牛排和马铃薯。
Many great writers were not appreciated fully while they were alive.
许多伟大的作家当他们活着时没有被充分重视。
all admit radical changes of destination once the journey has begun;
他们无不承认，一旦"旅程开始，目的地"常有急剧的变化。