常見(jiàn)例句雙語(yǔ)例句The primary source of infection was the oospore overwintered in soil and plant survival.其主要侵染來(lái)源是土壤中和植物病殘躰上越鼕的卵孢子。Primary infection source may be reduced by breeding and selecting the variety with the lower infected seedling rate of seed-borne SMV.可以通過(guò)選育和篩選種傳病苗率低的品種推廣，減少本病的初次侵染來(lái)源。It is presumed that chlamydospore may be the major primary infection source of rice false smut and begin to infect the panicles of rice before or after florescence.一般認(rèn)爲(wèi)厚垣孢子是稻曲病主要的初侵染源，在水稻開(kāi)花前後從穗部進(jìn)行侵染；http://dict.cnki.net 返回 primary infection source