He took the sample, filtered it until he was sure that only something very small could have remained, and then took a tiny drop and added it to freshly cultivated bacteria.
샘플을 가져다가 계속 여과하여 매우 작은 크기의 물질들만 남을 때 까지 걸러내었습니다. 그리고 이 물질을 갓 배양한 박테리아에 떨어뜨렸습니다.