a stern test of nerves的用法和样例：
- The first and second quarters of 2009 will provide a stern test of China's 8% growth commitment, then -- and the probity with which those figures are produced.
- First up they faced reigning champions Chelsea at the Millennium Stadium and after a stern test of their credentials they emerged triumphant courtesy of goals from Riise and Peter Crouch.
- But if this fixture offers a sterner test of United's resolve than some might expect, the French are far from invincible.
- Fiorentina midfielder Riccardo Montolivo expects Chievo to provide a stern test, but he believes the Viola can overpower them in Verona.