。
The bill passed both houses.
Literal
Bill [topic-は] both-houses [object-を] passed
両院 (りょういん) = 'both houses', referring to the two chambers of a bicameral legislature (in Japan, 衆議院 House of Representatives and 参議院 House of Councillors). 通る here is the intransitive 'to pass' used for bills, exams, tests — contrast with the transitive 通す ('to let pass').