0 the trying of various methods, alternatives etc until the right one happens to appear or be found -- phương pháp thử và sai
The simple division of the social spectrum into three layers is a result of a great deal of reading, thought, and trial and error.
This was done by trial and error until the desired proportion was produced by the model.
Although these processes are structured, the rules that govern them are rarely explicit; students typically learn by example, or trial and error.
These parameters are designed by trial and error.
However, in conventional fuzzy control design there is no well-defined method for them and often the design is done by trial and error.
This treatment was mainly based on trial and error and the experience of the therapist.
Suitable values are chosen by trial and error.
Decisions have to be reached through trial and error.
