backroom的复数形式为：backrooms...

They have been calling the Presidency decision a backroom deal.他们称总统人选问题是个幕后交易。He is confident the backroom can step into the temporary void...他确信原先的幕后智囊能够填补暂时的空缺。In the backroom study stood two desks side by side.在里屋书房里...

darkroom的复数形式为：darkrooms...

Kroo的音标：...