silkworm breeding短语¹³¹⁶²⁰⁺³ 基本例句 养蚕 农牧业 During silkworm breeding, it existed wide that mixed infection of pathogenic microbes resulted in worse quality and less quantity of silkworm cocoon and inhibiting sericulture development well. 蚕业生产中，病原微生物对家蚕的混合感染广泛存在，严重影响蚕茧优质高产，阻碍蚕业的健康发展。 fabiao