They treat their seeds with a fungicide to combat seedling diseases.他们用杀真菌剂浸了种子来防止秧苗受病.A new broad spectrum fungicide cyprodinil was briefly reviewed.简介了新型广谱杀菌剂嘧菌环胺.The fungicide prevents damping - off which is a most co...
大多数蝙蝠靠回声定位来飞行。Most bats navigate by echolocation.她在山顶上大声喊着,然后聆听着回声.She shouted on the mountaintop and listened for the echo.蝙蝠用一种回声测定法来判断距离.The bat judges distances by a kind of echo - location....