 
 <translate> The question: Aqueducts moved water through gravity alone, along a slight overall downward gradient within conduits of stone, brick, or concrete; the steeper the gradient, the faster the flow. Most conduits were buried beneath the ground and followed the contours of the terrain; obstructing peaks were circumvented or, less often, tunneled through. Where valleys or lowlands intervened, the conduit was carried on bridgework, or its contents fed into high-pressure lead, ceramic, or stone pipes and siphoned across. Most aqueduct systems included sedimentation tanks, which helped reduce any water-borne debris. Sluices and castella aquae (distribution tanks) regulated the supply to individual destinations. In cities and towns, the run-off water from aqueducts scoured the drains and sewers.

Answer this question: what force did the romans use to move water? <ibo> Ajụjụ: Ọ bụ naanị ike ndọda na-eme ka mmiri na-esi n'okporo ụzọ e ji nkume, brik, ma ọ bụ simenti rụọ na-agbada n'ala. A na-eli ihe ka ọtụtụ n'ime ọwa mmiri ndị ahụ n'ime ala ma na-agbaso ụzọ ndị dị n'ala ahụ; a na-ezere elu ugwu ndị na-egbochi ụzọ ma ọ bụ, mgbe ụfọdụ, a na-egwu olulu gafee ha. N'ebe e nwere ndagwurugwu ma ọ bụ ala dị larịị, a na-eji àkwà mmiri ebute ya, ma ọ bụ a na-etinye ihe ndị dị n'ime ya n'ime ọkpọkọ e ji ọla kọpa, seramiiki, ma ọ bụ nkume rụọ, bụ́ ndị a na-etinye n'okpuru nnukwu nrụgide ma na-esi n'ebe ahụ ebute ya. Ihe ka ọtụtụ n'ụzọ ndị e si eduzi mmiri na-agụnye tankị ndị e ji emepụta mmiri, bụ́ ndị na-enye aka ebelata ihe ọ bụla na-esi na mmiri apụta. Ihe ndị a na-akpọ sluices na castella aquae (ebe a na-ekesa mmiri) na-achịkwa ihe ndị a na-ebuga n'ebe ndị a na-ebuga ha. N'obodo ukwu na n'obodo nta dị iche iche, mmiri si n'olulu mmiri na-asọba n'olulu mmiri na n'olulu nsị.  Zaa ajụjụ a: Olee ike ndị Rom ji mee ka mmiri na-agagharị? 