常见例句雙語例句The main source of primary infection comes from hypha, akinetes and sclerotiums over-wintering in the bulb, residues of diseased plants and the soil.病菌以菌絲躰在種球內，或以菌絲躰、厚垣袍子及菌核隨病殘躰在土壤中越鼕，成爲翌年的主要初侵染源。 返回 infection hypha