How should Long Vowel Sound be pronounced? The question is devided into two parts: When a long vowel comprises two characters with the same vowel, say, いい, should it be uttered as two close but seperate sounds, like “i-i”, or a continuous long sound, like "i—“? I'm asking because in the audio of "标准日本语”, they sound seperate. And when a long vowel comprises two characters with different vowel, say,おう, should it be uttered as two successive sounds, like "o-u", or a continuous long sound, like "ou—", or "o—"? This really confuses me..... Thank you!