自2010年至今的四级考试中， 共出现过 次
自2010年至今的六级考试中， 共出现过 次
N-COUNT 出身背景；学历；经历 Your background is the kind of family you come from and the kind of education you have had. It can also refer to such things as your social and racial origins, your financial status, or the type of work experience that you have.
Moulded by his background, he could not escape the traditional role of strict father...
She came from a working-class background...
N-COUNT （事件或情况的）背景 The background to an event or situation consists of the facts that explain what caused it.
The background to the current troubles is provided by the dire state of the country's economy...
The meeting takes place against a background of continuing political violence.
N-SING 背景声音；背景音乐 The background is sounds, such as music, which you can hear but which you are not listening to with your full attention.
I kept hearing the sound of applause in the background...
...police sirens wailing in the background...
N-COUNT （画等的）后景 You can use background to refer to the things in a picture or scene that are less noticeable or important than the main things or people in it.
...roses patterned on a blue background...
Paint the background tones lighter and the colours cooler.