私の力では

beyond my ability

→ 私
phrase Rare #33,745
beyond my ability Indicates that something cannot be done or handled with the speaker's current ability or power. では marks a limitation or scope: "as far as my ability goes."
JA: 私の力では、この問題を解決できません。
EN: I can't solve this problem with my abilities.

私の力では抑えて一時

With my strength, I can only keep it at bay for so long.

— 崖の上のポニョ (2008)

この本は私の力では及ばない

This book is beyond my abilities.

これは私の力では無理です

This is beyond my ability.

私の力では止められない

I can't stop it.

— タイタニック (1997)