The Iranian capital Tehran is at the best of times - one of the most polluted cities on earth.

即使在环境状况最好的时候，伊朗首都德黑兰仍然是世界上污染程度最严重的城市之一。

youdao

These quibbles aside, the Tehran Times was confident that the election result would testify to the "political vigilance and maturity of the Iranian people".

BBC: Iranian press hails expected high turnout

Mr. GARETH SMYTH (Tehran Correspondent, Financial Times, ): Hello.

NPR: Iran Plays to Domestic Audience in Nuclear Talks

The letter is said to mention a model of centrifuge, called IR2m, which can enrich two or three times faster than the present equipment being used by Tehran, according to the Associated Press.

BBC: Natanz uranium enrichment plant