True, returns on capital employed have come down from the very high 20 per cent level of five years ago to just over 10 per cent now. But they remain well above operators 'cost of capital& at least for those that are sensibly capitalised. 诚然,已动用资本回报率已从五年前相当高的20%下降到现在的10%出头,但仍远高于运营商的资本成本&至少对于那些资本结构合理的运营商而言。