With the dollar slumping to a 26-year low against the pound, already-expensive London has become quite unaffordable.
主干：...London has become unaffordable.
这是个简单句，句首的with+宾语(the dollar)+宾补(slumping to...)作状语，表示原因。
译文：随着美元兑换英镑跌至26年来的最低，原本已经很昂贵的伦敦变得让人去不起了。
体坛英语资讯：World womens tennis No. 1 doubles split: report
体坛英语资讯：Chinas Shandong out of AFC Champions League with four consecutive losses
体坛英语资讯：Federer suffers loss to Gulbis at Rome Masters
体坛英语资讯：Adebayor retires from national soccer team
体坛英语资讯：53,000 tickets sold in eight hours: FIFA
体坛英语资讯：Real Madrid beat Valencia to move within one point of Barca
体坛英语资讯：Bryant out for final two games
体坛英语资讯：Lakers, Knicks, Timberwolves to take preseason tour in Europe
体坛英语资讯：Portuguese soccer chief keeps cool-minded about high FIFA world ranking
体坛英语资讯：IOC releases report on Kumaritashvilis death
体坛英语资讯：FIFA happy with World Cup ticket sales
体坛英语资讯：Reals Ramos vows to fight on
体坛英语资讯：Rhode ties world record to claim shooting gold
体坛英语资讯：Bower resigns as Hornets coach
体坛英语资讯：Real loses Raul through injury for next three games
体坛英语资讯：Real Madrid confirms captain Raul not play this season
体坛英语资讯：Jankovic eliminated at Charleston WTA tennis
体坛英语资讯：Real wins in Almeria to keep title chase
体坛英语资讯：Nets Williams, Warriors Curry lift April rookie awards
体坛英语资讯：Rams picks quarterback Sam Bradford No. 1 in NFL draft
体坛英语资讯：Hamburg,Wolfsburg victorious on Bundesliga Sunday
体坛英语资讯：Former IOC chief Samaranch dies at 89, Rogge pays tribute
体坛英语资讯：Olympic 400m champion Merritt tested positive
体坛英语资讯：Rockets Brooks named NBAs most improved player
体坛英语资讯：Manchester United go atop in beating Spurs 3-1
体坛英语资讯：Valladolid beat Sevilla 2-1
体坛英语资讯：Reals defender Metzelder out for three weeks
体坛英语资讯：Santos beats Sao Paulo 3-2 in semifinals of state tournament
体坛英语资讯：South Africa prepares for WC warm-up against China
体坛英语资讯：Vagner Loves two goals sends Flamengo into finals of state championship