最后，以石油安全度为工具，对中国近年来石油安全的形势进行了定量评价。

Finally the degrees of petroleum security are used as a tool to make a quantitative appraisal of the petroleum security in China in recent years.

youdao

最后，以石油安全度为工具，对中国近年来石油安全的形势进行了定量评价。

Finally the degrees of petroleum security are used as a tool to make a quantitative appraisal of the petroleum security in China in recent years.

youdao