a cumbersome obligation的用法和样例：
- In China, getting such approvals could be a cumbersome process.
- Do the Rockets have a cumbersome backcourt crowd? Or a decent surplus of guard talent?
- It would not make sense to inject that much power into one point of the grid, and liquid helium is a cumbersome coolant.
- The latter may be a cumbersome way of arguing that many soldiers should be pulled out of the country, perhaps in 2008.