испытание; исследование; проверка; проба; опыт
- by trial and error
- buy something on trial
- order goods on trial
- trial of pyx
- acceptance trial
- assessment trial
- comparative trial
- development trial
- evaluation trial
- fattening trial
- feeding trial
- field trials
- laying trial
- manufacturer's trial
- performance trial
- proving trial
- random trial
- repeated trial
- replicated trial
- service trial
- test trial
- user trial