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科学时代收录了3405121条科普词条，基本涵盖了常见科普常识及英语词汇的翻译，是科学学习和研究的有利工具。

Le Sueur, Jean-François	Lesueur, Jean-François	Lesure, François	Les Verrieres	Lesvos, Nisos
Les vêpres siciliennes	Lesynky(Lyakhovskiye)	Leszczyński	Leszno (Leshno)	LES （land earth station）
let	letal-lipostrat	Letche	Letchworth	letdown
let down	letdown heat exchanger	let-down heat exchanger	let-down pigments	let-down procedure
let-down stream	let-down system	letdown system	letdown valve	letdown water
Letea, Ostrovul	Le Teil	Letepsammia formosissima	let fall	let flow
let go	let go anchor	let go by the run	Letha	lethal
lethal action	lethal agent	lethal allele	lethal amount	lethal chemical agent
lethal concentration	lethal concentration 50% (LC50)	lethal density	lethal dosage	lethal dosage 50% (LD50)
lethal dosage; LD	lethal dose	lethal dose 100	lethal dose 50	lethal dose 50/30
lethal dose 50% { = LD50}	lethal dose 50 (LD50)	lethal dose-50 time	lethal dose {=LD}	lethal dose {= LD}
lethal dose {= LS}	lethal dose， LD	lethal effect	lethal equivalent	lethal exposure
lethal gene	lethal high temperature	lethal index	lethal intestinal virus of infant mice (LIVIM)	lethality
lethality rate	lethal junctional	lethal laser	lethal mutation	lethal period
lethal radius	lethal rate	lethal temperature	lethal temperature; fatal temperature	lethal time
lethal toxin	lethal ultraviolet radiation	Letharchus Goode & Bean，1882	Letharchus rosenblatti McCosker，1974	Letharchus velifer Goode & Bean，1882
lethargic	lethargic encephalitis	Lethargic encephalitis; Sleeping sickness; Nona	lethargy	lethargy (logarithmic energy decrement)
lethargy of a neutron	Lethbridge	Lethe bojonia	Lethe butleri periscelis	Lethe chandica ratnacri
Lethe christophi hanako	Lethe confusa	Lethe diana australis	Lethe europa pavida	Lethe gemina zaitha
Lethe insana formosana	Lethe mataja	Lethenteron appendix (DeKay，1842)	Lethenteron Creaser & Hubbs，1922	Lethenteron japonicum (Martens，1868)
Lethenteron kessleri (Anikin，1905)	Lethenteron reissneri (Dybowski，1869)	Lethenteron wilderi Gage，1896	let her off	Lethe rohria daemoniaca
let her ride	let her up	Lethe verma cintamani	Lethocerus deyrolli	Lethocerus indicus
Lethogaleos andersoni McCosker & Böhlke，1982；forgetful snake eel	Lethogaleos McCosker & Böhlke，1982	Letholycus Anderson，1988	Letholycus magellanicus Anderson，1988	Letholycus microphthalmus (Norman，1937)
Lethops connectens Hubbs，1926；half blind goby	Lethops Hubbs，1926	Lethotremus awae Jordan & Snyder，1902	Lethotremus Gilbert，1896	Lethotremus muticus Gilbert，1896；docked snail fish
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