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一体， いったい
1. (what) the heck, (why) in the world, (who) on earth
2. one object, one body, unity
3. one form, one style
4. one Buddhist image (or carving, etc.)
5. generally, in general
一体；到底(怎么回事)；通常，一般来说
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
