Перевести с : mention should be made that the electricity generated by atomic power stations still costs more less than the obtained from thermal power stations, to say nothing of the electricity produced by hydropower stations

Следует упомянуть, что электричество генерирующееся на атомных электростанциях по-прежнему стоит больше, чем электричество тепловых электростанций, не говоря уже об электроэнергии, произведенной гидроэлектростанциями.

A very interesting event happened during the 1986 football World Cup in Mexico. On June 22, Argentina and England played against each other in the semifinals. Fans and players for both teams felt very strongly about this match. Only four years earlier, England and Argentina fought a war over the Falkland Islands. Since England had prevailed in the conflict, many Argentinians saw this game as a chance for revenge. English football fans were equally passionate about winning the game because they saw it as a good chance to win the World Cup.

Many употребляется только с исчисляемыми существительными во множественном числе:There are many children in the park. There are many expensive cars in front of that house. Нет никакой разницы, с какими существительными употреблять словосочетание a lot ofThere are a lot of children in the park. There is a lot of water on the floor.Поэтому в случае затруднения в определении качества существительного, можно смело использовать a lot of.В отрицательных и вопросительных предложениях обычно используются только much/many:There isn't much water on the floor.