Connect your main branches to the central picture and connect your second-and-third-level branches to the first and second levels, etc.

将你的主要分支连接到中间图片，并将你的第二级和第三级分支连接到第一级和第二级，以此类推。

youdao

Central heating was present in every upper-middle class home by the second half of the 19th century.

到19世纪下半叶，中上层阶级家庭都用上了中央供暖。

youdao

Central heating was present in every upper-middle-class home by the second half of the 19th century.

到19世纪下半叶，中央供暖系统已出现在每个中上层家庭里。

youdao

The Chicago White Sox are currently in second place in the American League Central Division, one game behind the team they face on the road in the coming days, the Detroit Tigers.

VOA: standard.2009.07.24

Central banks' second function is macroeconomic stabilisation, setting interest rates to keep inflation in check without causing the economy to stop and start.

ECONOMIST: CSI: credit crunch | The

The Russian leadership is painfully aware that it still does not have the financial or military resources to pit itself against the United States, let alone to woo back the countries of Central Asia a second time.

ECONOMIST: And the Russians are upset

Surrey, a municipality south of the city - whose mayor was rated one of the best in the world - is becoming the second central business district for the metro Vancouver area and is linked by SkyTrain to downtown.

BBC: Living in: Vancouver