在非洲热带地区的农田里,生长着许多既凶狠又狡猾的寄生草。农民们对它们深恶痛绝,却又无可奈何。这种草自己没有根,在土壤中紧紧地“咬”住玉米、高梁、甘蔗、水稻、小麦等禾本科作物的根,吸收养分,然后伸出地表,长出自己的茎叶,开花,结籽。每株玉米的周围,往往都长出一 In the fields of tropical Africa, there are many parasitic grasses that are both fierce and cunning. Farmers hate them, but do nothing. The grass itself has no roots and tightly “bites” the roots of gramineous crops such as corn, sorghum, sugar cane, rice and wheat in the soil to absorb the nutrients and then reach out to the surface to grow their stems and leaves. Flowering, seed. Around every corn plant, often grow one