specialise|specialize

我学生物学，并计划专攻遗传学。

I study biology and plan to ___specialize in genetics.

医学院毕业后，他希望专攻心脏病学。

After medical school, he hopes to ___specialise in cardiology.

他在大学毕业后决定专攻人工智能领域。

After graduating from university, he decided to ___specialize in artificial intelligence.

他选择在计算机科学领域专攻人工智能。

He chose to ___specialise in artificial intelligence within computer science.