单词 | pre-chemical |
释义 | > as lemmaspre-chemical pre-chemical adj. Brit. /(ˌ)priːˈkɛmᵻkl/ , U.S. /ˌpriˈkɛmək(ə)l/ ΘΚΠ the world > matter > chemistry > chemical substances > [adjective] > of or relating to chemicals > before chemicals pre-chemical1916 1916 Proc. Royal Soc. 1915–16 A. 92 385 They [sc. steps in ignition] must be regarded as pre-chemical atomic combination, caused by direct electrification. 1996 Econ. Hist. Rev. 49 214 Both constraints, operating within the context of pre-chemical and pre-mechanical agricultural sytems,..limited the scale and scope of French endeavours to follow the path taken by Britain. < as lemmas |
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