conservation是什么意思

双语用例

• I have also received letters on the subject from a wide range of conservations bodies.

• I am sure the conservations were very useful.

• The cut-off rate of return for conservation investments in barley is lower than 5 per cent.

• Economic analyses of soil conservation investments may be done from private and social perspectives.

• When such benefits from conservation are lower than the associated costs, conservation does not bring any gains to the farmer.

• Accordingly, past soil conservation research was geared mainly towards structural methods.

• A realistic policy in the short term should consider new ways of offsetting the yield penalty and subsidizing the initial investment costs of conservation.

• The model assumes that conservation structures are implemented at the end of the first year or beginning of the second year.