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current levels of dioxin and pcb contamination generally reflect historical emissions
mae lefelau presennol difwyno o ganlyniad i ddiocsinau a biffenylau polyclorinedig yn gyffredinol yn adlewyrchu natur gollyngiadau yn y gorffennol
<PROTECTED> 12616:2002 divides optional categories into three types relevant to different levels of entities in a database, as follows:
mae <PROTECTED> 12616:2002 yn rhannu’r categorïau dewisol yn dri math ac yn berthnasol i wahanol lefelau o endidau mewn cronfa.
the report also provides more detailed examinations of three key areas of health , namely respiratory disease , sexual health , and levels of physical activity
mae'r adroddiad hefyd yn cynnig archwiliad manylach o dri maes iechyd pwysig , sef clefydau anadlu , iechyd rhywiol , a lefelau gweithgarwch corfforol
you set out three levels of eligibility with varying amounts of money for each , but you have not said how much money will be available to help those people who do not fall into those three categories
nodasoch dair lefel o gymhwyster a gwahanol symiau o arian ar gyfer pob un , ond ni ddywedasoch faint o arian a fydd ar gael i helpu'r rhai nad ydynt yn y categorïau hynny