We found that there were no significant differences in both Mandarin and English retroflex sounds between the groups of native and non-native speakers of Mandarin.

• 虽然不同族群受访者在国语及英语捲舌音上的表现无显著差异，但单就国语及英语捲舌音的表现而论，两个语言之间的表现呈现显著的正相关性。