彼は年の割には行動的だ。

Meaning
he's active for his age

Vocab used in this sentence

he, his, him, boyfriend
a, the, is, am, are, will
year, years, age
to, of
percentage, ratio, proportion, cut, rate, separate, profit, crack, assignment, split, divide
in, to, on, at, into, upon
a, the, is, am, are, will
行動
act, action, behavior, conduct, behave, behavioral, behaviour, demeanor, mobilization
a, mark, typical, target, objective
is, be, are, am, it is, seems

Jeffrey van Binsbergen is a highly skilled developer, known for his expertise in optimalisations and AI.