Update lm_train_tutorial.md

Yabin Li

2023-12-15 d2266616a142b7f57f29f1a840458a9865f953ac

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st    street
st    saint
dr    doctor
dr    drive
mt    mount
sr    senior
prof    professor
mt    mountain
sr    senior
jr    junior
vol    volume
rd    road
ave    avenue
approx    approximately