伯特周末在拉斯维加斯赌博输了3000美元.Burt lost $ 3000 gambling in Las Vegas over the weekend.一个赌徒从家里拿了1000美金去赌博.A gambler carried $ 1000 from home and went to casino.迈克尔赌博输了两万元.Michael lost $ 20 000 gambling....
为保持土壤肥力,农民搞作物轮作.Farmers rotate their crops so that the soil will remain fertile.农作物轮作有助于防止水土流失.Crop rotation helps prevent soil erosion.他连续5年在同一块地里种植不同的作物,研究人员称之为轮作。He grew a different crop on the same field five years i...
The soil washed from the hills is silting up the hydroelectric dams.从山上冲刷下来的泥土就要让水电大坝淤塞了。These dams have restricted the flow of the river downstream.这些堤坝限制了河水顺流而下。Large dams have harmed Siberia's delicate ecological...