Radiolabelling
[化] 放射性标记
🗣️ 情景例句
She's always changing jobs.
她老是换工作。
The man is surveying land for a national park.
这个人正在测量国家公园的土地
Yes, speaking. Just a moment. Let me turn the music down. There, that's better.
是的，我就是。请稍等。让我把音量关小一点。你瞧，好多啦。