| Until standards were firmly in place, child placers would stumble along with nothing to guide them but trial and error. |
| By trial and error, I moved toward achieving my goals, and you can do the same. |
| Maybe we should learn by trial and error by either overworking or underworking our swimmers. |
| So, after a lot of trial and error, I finally got the spell right to implant the idea that he'd like to go on holiday. |
| When her judgement failed, she had tried an elaborate process of trial and error. |
| They had better success, after much trial and error, by using a one-step cocktail fixative. |
