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半致死剂量
agric.
lethal dose 50
(LD
50
)
;
medial lethal dose
desert.
lethal dosage 50%
;
median lethal dose
(LD50)
earth.sc.
half lethal dose
genet.
50% lethal dose
oil
median lethal dose
space
median lethal dose
(在规定时间内,生物群体的50%死亡所需的吸收剂量)
tech.
fifty percent kill
;
lethal dose
;
lethal dose fifty percent
water.res., ecol.
lethal dose 50%
;
median fatal dose
半致死剂量
的
gen.
semilethal
半致死剂 量:
5 phrases
in 3 subjects
Agriculture
1
Electronics
3
Technology
1
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