The passive immunization of newboth calves was obtained by colostrums, but the influencing degree of the effect the heat stress on passive immunization of newboth calves is dimness.
新生犊牛通过初乳获得被动免疫，但是关于热应激对新生犊牛被动免疫的影响程度尚不清楚。
The passive immunization of newboth calves was obtained by colostrums, but the influencing degree of the effect the heat stress on passive immunization of newboth calves is dimness.
新生犊牛通过初乳获得被动免疫，但是关于热应激对新生犊牛被动免疫的影响程度尚不清楚。
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