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心機一転， 心気一転， しんきいってん
1. changing one's attitude, turning over a new leaf, getting a fresh start
tbd
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やり直す， 遣り直す， 遣りなおす， やりなおす
1. to do over again, to redo, to start over, to remake, to resume, to recommence
重做，重来，重新开始
は
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis
指示句子的主题；表示与另一选项（无论是否明确提及）形成对比；表示强调
