fix task.py with no dest_sample_rate task; fix bug in train and infer

mengzhe.cmz

2023-04-12 1ad439f96b8cdbca98ee95b886d692dfa20e85ce

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una    isa
pangalawang    dalawa
pangatlo    tatlo
ikaapat    apat
ikalimang    lima
ikaanim    ikaanim
ikapitong    pito
ikawalo    walo
ikasiyam    siyam