鉄, 鐵, てつ
1. iron (Fe)
2. steel
3. iron (will, discipline, lady, etc.)
4. railway
5. railway enthusiast
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