have one's fingers in many pies

慣用表現

(idiomatic) to be involved in many, or too many, different things.

日本語の意味

様々な分野に顔を出している / 複数の異なる事業や活動に関与している / いろいろな事に手を出している

If one wants to specialize, one should not have one's fingers in many pies.

専門分野で成功したいなら、あれこれ手を出してはいけない。

意味（1）

(idiomatic) to be involved in many, or too many, different things.

has one's fingers in many pies

（ present singular third-person ）

having one's fingers in many pies

（ participle present ）

had one's fingers in many pies

（ participle past ）

had one's fingers in many pies

（ past ）