He has been running round in circles trying to get his bussiness pick up. 他一直尝试让他的生意好转，但是没有用，一直都在原地兜圈子。
这个词的含义可不是指“有趣的生意”，这个口语表达的意思是:“不道德的，非法的行为，耍小把戏”。e.g. Advances in computer technology are being used by criminals to make funny money. 罪犯利用计算机技术的进步来赚黑钱。
“Whenever they get together， there's always some kind of monkey business happening.”没有做重要的事情，而是在做一些无关紧要的、嬉戏或无聊的活动。
China's central bank has ramped up support for renminbi settlement in new forms and models of foreign trade to better serve the real economy and facilitate trade and investment. In a recent circular， the People's Bank of China improved policies for cross-border renminbi business in e-commerce and other new models of foreign trade.
