backgroud的用法和样例：
词汇搭配
- recede into the background 不再突出(不再重要...
- drive into the background 推到幕后,置于次要的...
- push into the background 推到幕后,置于次要的...
- remain in the background 暗中
- keep in the background 暗中
- stay in the background 留在幕后
- throw into the background 推到幕后,置于次要的...
- in the background 不露面
- stand in the background 处于隐蔽地位,不出面...
- melt into the background 逐渐消失,渐渐由浓变...
