Emily Patterson: Catherine Bell.

帕特森·凯瑟琳：艾米丽钟。

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While concentrations varied daily, typical concentrations of lead particles ranged from 0.6 to 1 microgram per cubic meter of air, Bell and her thesis adviser Catherine Cahill found.

Bell和她的论文导师Catherine Cahill发现，尽管浓度含量每天都发生变化，铅浓度含量一般在0.6到1微克每平方米空气之间。

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Departmental deputy secretary, Catherine Bell, said the programme was a response to an employment environment changed by the recession, in which it is more difficult to find employers willing to pay apprentices.

BBC: Employment and Learning Committee