。
Ontogeny recapitulates phylogeny.
Literal
Individual-development [topic-は] phylogenetic-development [object-を] repeats.
個体発生は系統発生を繰り返す — the Japanese rendering of Haeckel's biogenetic law. 個体発生 'ontogeny' and 系統発生 'phylogeny' are technical biological terms built from Sino-Japanese compounds. A famous scientific aphorism.