Competition between the production groups is hotting up rapidly.生产小组之间的竞争很快日趋激烈。Campaigning is expected to start hotting up today.预计竞选从今天开始会进入白热阶段。The police are hotting up the search.警方正加紧搜查。The soup soon began hotting up.汤很快热了起来。The competition is really hotting up now.现在比赛已进入白热化状态。