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单词 ultra-pure
释义

> as lemmas

ultra-pure
ultra-pure adj.
Brit. /ˌʌltrəˈpjʊə/
,
/ˌʌltrəˈpjɔː/
,
U.S. /ˌəltrəˈpjʊ(ə)r/
ΚΠ
1961 New Scientist 26 Oct. 237/2 Ultra-pure or conductivity water was, until a few years ago, a substance made in small quantities by multiple distillation..mainly for use in research laboratories.
1973 Nature 13 Apr. 482/3 The preparation, handling containment and analysis of ultrapure materials.
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