| 单词 | bk | 
| 释义 | bk.n.1  As a graphic abbreviation: = book n. ΘΚΠ society > communication > book > 			[noun]		 bookeOE volumec1380 biblet1388 volumenc1540 tome?1570 bk.1645 vol.1682 1645    T. Hooker Immortality of Mans Soule i. 13  				His Bk. of doubts concerning the soule. 1773    M. Hemmings Abridgm. Hooker's Eccl. Polity Subscribers Names sig. A5  				Williams, Adam, Esq; 3 Bks. 1795    T. Williams Hist. Def. Exper. Relig. II. x. 27  				Burnet's Hist. of the Reform. Bk. II. 1848    D. W. Turner Notes on Herodotus  i. i. 2  				See also Prideaux' Connection, Pt.i. Bk.1. 1869    Michigan Univ. Mag. 3 128  				In winter, Hom. Odyss. IX, XII, XV, XVII and XVIII, bks, with grammatical criticism. 1917    Jrnl. Royal Soc. Antiquaries Ireland 6th Ser. 7 180  				His popularity with the Anglo-Irish at least is attested by the Annals contained in the Bk. of Howth. 1992    ELT Jrnl. 46 119 		(list)	  				Test-based language practice at upper-intermediate level; plus..Resource Bk, and cassettes. 2015    Virginia Law Rev. 101 1371  				Compare..with John Milton, Paradise Lost, bk. I. This is a new entry (OED Third Edition, March 2019; most recently modified version published online March 2022). Bkn.2 Chemistry.   The element berkelium. ΘΚΠ the world > matter > chemistry > elements and compounds > metals > specific elements > berkelium > 			[noun]		 berkelium1950 Bk1950 1950    Charleston 		(W. Va.)	 Gaz. 23 Jan. 2/3  				It is in line to christen the new chemical baby berkelium, and the symbol will be Bk, since Be is already used for beryllium. 1988    F. A. Cotton  & G. Wilkinson Adv. Inorg. Chem. 		(ed. 5)	 xxi. 1015  				There is a distinct break between Gd and Tb and between Cm and Bk, which can be attributed to the small change in ionic radius occasioned by the filling of the 4f and 5f shells, respectively. 2013    Talanta 106 39  				The Bk and Cf separation is based on a lanthanide separation protocol previously developed by the laboratory. This is a new entry (OED Third Edition, December 2013; most recently modified version published online December 2021). <  | 
	
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