Given a sentence in English language, translate the sentence to Tagalog language keeping the meaning of the original sentence intact.

English sentence: When Jesus called them to be "fishers of men, @ He revealed a similar plan for spiritual multiplication.
Nang sila ay tinawag Ni Jesus para maging âmamamalakaya ng taoâ ipinahayag Niya ang kaparehong plano para sa espirituwal na pagpaparami.

English sentence: The au pair must have a good understanding of German, the national language.
Ang au pares ay dapat magkaroon ng isang mahusay na pag-unawa ng Aleman, ang pambansang wika.

English sentence: Clifford also proved that a Riemann surface is topologically equivalent to a box with holes in it.

Clifford din na ang isang Riemann ibabaw topologically ay katumbas ng isang kahon na may butas sa mga ito.