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手を挙げる， 手を上げる， 手をあげる， てをあげる
1. to raise one's hand
2. to surrender
3. to raise one's hand to someone (as a threat to strike)
4. to become better (at something), to improve
5. to throw one's hat in the ring, to volunteer, to indicate one intends to participate, to raise one's ha...
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
