求翻译：　　四要认真落实今年的住房用地供应计划，确保保障性住房用地，加快普通商品住房用地投放。认真执行《国有土地上房屋征收与补偿条例》。是什么意思？

　　Four should conscientiously implement this year housing land supply plan, ensure security housing land, speeding up the ordinary commodity housing land to inject. Seriously implement the State-owned housing on land expropriation and Compensation Ordinance.