内心坚强的英语

Inner strength in English can be expressed as "inner resilience" or "mental fortitude."
Here's a concise example:

• "After overcoming the loss of her mother, she displayed incredible inner resilience, which was evident in her ability to continue her studies and excel in her career."
  实操提醒：培养内心坚强，每天进行一项挑战自己极限的小事。

Inner strength in English can be expressed as "inner resilience" or "mental fortitude."