The first step was to determine a working ratio between anticipated casualties and future needs for whole blood.

第一个步骤是确定预期伤员的数量和后续的全血需求量之间的比率。

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Working ratio Cash working expenses divided by operating revenues, expressed as a percentage.

营业费用比率即现金经营费用除以营业收入，以百分比表示。

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The low ratio of working moms sparked concern at Regus.

FORBES: Companies Reluctant To Hire Working Moms

It is also working on a gender equality action plan to boost its ratio of female leaders though it admits it will miss its slated target of 30% by end 2013.

CNN: Can`womenomics' save Japan?

It found that for younger working households throughout Wales, the average house price to income ratio is now more than four to one.

BBC: NEWS | UK | Wales | Affordable housing 'crisis' fear