| 单词 | ring compound |
| 释义 | > as lemmasring compound ring compound n. ΚΠ 1885 Jrnl. Chem. Soc. 47 804 Another method for forming these ring-compounds was..afterwards found. 1932 Discovery Aug. 246/1 A half-way stage between the most stable kind of carbon chain compound, and the most stable kind of ring compound. 1988 J. D. Barrow & F. J. Tipler Anthropic Cosmol. Princ. (rev. ed.) viii. 549 The purines adenine and guanine, and the pyrimidines cytosine, uracil, and thymine,..are ring compounds with two nitrogen atoms per ring. < as lemmas |
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