1
changing one's mind (and betraying someone);turning traitor (to);betraying;double-crossing;having a change of heart
スミス先生は彼らに英語の発音の反復練習をさせた。
Mr Smith drilled them in English pronunciation.
2
reversing;turning around;flipping;turning upside down
3
repetition;repeat;reiteration
See also:
反復 (はんぷく)