experiment + test performed to assess new ideas or theories ☊ experimental + using techniques that are different or untried before ☊ experiment ☊ 
thí nghiệm ☊ experiment ☊ thực nghiệm ☊ experiment + test performed to assess new ideas or theories ☊ experimental + using techniques that are different or untried before ☊ experiment ☊ thí nghiệm ☊ experiment ☊ thực nghiệm ☊