Different language domain, there are large differences in voice characteristics. The informal English Pronunciation ambiguous tone fluctuated. The official English voice is clear, voice tone become stable monotonous.

In Arabic the voice characteristics, there were also large differences. Informal English voice tone is vague and ambiguous, peaks and valleys. And the formal English voice clearly, voice tone, tending toward smooth monotonic.

The language territory difference, the pronunciation characteristic also has the big difference.The unofficial English pronunciation is unclear, the intonation go up and down abruptly.But the official English pronunciation is clear, the pronunciation intonation all hastens steadily monotonous.

Register different phonetic features also have large differences. Informal English pronunciation is ambiguous, high tone suddenly goes up and down low. And the official English voice clear, voice tone smooth monotony.

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