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单词 ni
释义

Nin.

Brit. /ˌɛnˈʌɪ/, U.S. /ˌɛnˈaɪ/
Origin: Formed within English, by clipping or shortening. Etymons: nickel n.; Latin niccolum.
Etymology: Symbolic abbreviation for nickel n. or for post-classical Latin niccolum (see niccolic adj.).
Chemistry.
The element nickel.
ΚΠ
1814 tr. J. J. Berzelius in Ann. Philos. 3 355 Niccolum, nickel (Ni).
1865 Philos. Trans. (Royal Soc.) 155 73 The numbers..corresponding to the elements Bi, Pb, Au, Pt, Sn, Zn, Cu, Ni, Fe, and S..are multiplied by the respective specific heats of these bodies.
1924 A. J. Allmand & H. J. T. Ellingham Princ. Appl. Electrochem. (ed. 2) xv. 281 Desulphurised copper-nickel matte is cast into anodes which contain 54.3 per cent. Cu and 43.1 per cent Ni, the remainder being sulphur and iron.
1932 R. Hum Chem. for Engin. Students xxviii. 794 Nickel steels, containing about 3½ per cent. Ni, have very high tensile strength.
1988 BioFactors 1 11/2 Species such as Alyssum have been classified as ‘hyperaccumulators’ of Ni when grown on soils enriched in Ni ores.
This is a new entry (OED Third Edition, September 2003; most recently modified version published online March 2022).

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NI
NI n. British = national insurance n.
ΚΠ
1966 Econ. Jrnl. 76 172 The cost of N.I. contributions varies with the number of earners in the household.
a1974 R. Crossman Diaries (1976) II. 637 Kenneth replied that he would like to pay for the whole thing by a ninepenny increase in the N.I. contribution.
1991 Which? Apr. 218/1 When you contract out through a personal plan, part of your NI contributions go toward a personal pension instead of into the NI fund.
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