1.They raised the price of rice from $1.5 to $2.5 per kilogram.
他们将米价由每公斤1.5美元提高到2.5美元。
2.By comparison, one kilogram of tomatoes requires 160 litres of water.
相比之下,生产一公斤的番茄需要160升水。
3.For example, the kilogram scale allows you to assign a number to an object indicating its weight based upon standardized displacements of measuring instruments.