non-radioactive
non-radioactive — 形容詞
1. describing a material or substance that gives off no harmful radiation, so it is
非放射性的
不會發出有害輻射的（物質）
describing a material or substance that gives off no harmful radiation, so it is safe to handle around people and food.
The hospital uses non-radioactive markers to track blood flow in young patients.
這家醫院使用非放射性的標記物來追蹤年幼病患的血液流動。
attributive: non-radioactive + noun (markers, tracers, samples)
Aylin's lab switched to non-radioactive dyes after a junior staff member raised safety concerns.
在一位資淺員工提出安全疑慮後，Aylin 的實驗室改用非放射性的染劑。
common collocation: non-radioactive dye / tracer / isotope
Most metals in your kitchen, like iron and copper, are completely non-radioactive.
你廚房裡的多數金屬，例如鐵和銅，都是完全非放射性的。
The factory promised the soil around the river was now non-radioactive and safe for farming.
工廠保證河岸周邊的土壤現在是非放射性的，可以安全用來耕作。
Vivek explained that the glow-in-the-dark paint on the watch is non-radioactive and harmless.
Vivek 說明，這支手錶上的夜光漆是非放射性的，沒有危害。
- radioactive
direct opposite — gives off harmful radiation
用法筆記
Often used to reassure readers about safety: pairs typically with nouns like 'tracer', 'dye', 'isotope', 'material', 'sample', or with verbs of becoming/proving ('proved non-radioactive', 'remains non-radioactive').