Frogs eat pests which destroy crops and carry diseases.青蛙吃破坏庄稼、传播疾病的害虫。This wet area also attracts frogs, toads and newts.这片潮湿地区也吸引了青蛙、蟾蜍和蝾螈一类的生物。the croaking of frogs蛙鸣...
The life cycle of maize is that of a typical angiosperm.玉米的生活史是被子植物中比较典型的.Funicle ( funiculus ) The stalk attaching the ovule ( later the seed ) to the placenta angiosperm ovaries.中连接胚珠 ( 之后的种子 ) 和胎座的柄.Funicle ( funiculu...