Translate the following underlined sentences into English. 要使房价保持在合理水平上，一是必须增加有效供给。今年计划建设保障性住房和棚户区改造住房1000万套。今后五年计划新建保障性住房3600万套。
TO KEEP HOUSING PRICES AT A REASONABLE LEVEL, FIRSTLY WE MUST INCREASE EFFECTIVE HOUSING SUPPLY.
Translate the following underlined sentences into English. 要使房价保持在合理水平上，一是必须增加有效供给。今年计划建设保障性住房和棚户区改造住房1000万套。今后五年计划新建保障性住房3600万套。
TO KEEP HOUSING PRICES AT A REASONABLE LEVEL, FIRSTLY WE MUST INCREASE EFFECTIVE HOUSING SUPPLY.
