It might involve omitting especially awkward readings; or where, for example, a heat source like an airport has sprung up alongside a weather station, inputting a lower temperature than the data show.

Nevertheless, where both negotiators had lived abroad 70% struck a deal in which the seller was offered a management job at the petrol station in return for a lower asking price.

For Moscow to the Great Wall Station circuit, the lower the frequency, the larger the fading depth.