be in the van of progressexp USA: biː· ɪ'n ðiː· væ'n ʌ·v proʊ·gre's UK: biː ɪn ðiː væn ɔv proʊgres
be in the vanguard of progressexp USA: biː· ɪ'n ðiː· væ'ngɔ"rd ʌ·v proʊ·gre's UK: biː ɪn ðiː vængɑd ɔv proʊgres
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