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ばか， バカ， 馬鹿， 莫迦
1. idiot, moron, fool
2. stupid, foolish, dull, absurd, ridiculous
3. trivial, insignificant, disappointing
4. malfunctioning, defective, losing sensation
5. incredibly, unusually, exceptionally
6. fervent enthusiast, nut, person singularly obsessed ...
tbd
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
