We obtained petrol by requisition.是什么意思？

We obtained petrol by requisition.

我们通过征用获得了汽油.

we

pron. 我们，咱们，笔者，本人，朕，人们；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

obtained

v. 获得( obtain的过去式和过去分词 )，买到，（规则、制度、习俗等）存在，流

例句
I had obtained the authentic details about the birth of the organization.
我已经掌握了有关该组织诞生的可靠的详细资料。

petrol

n. 汽油；

例句
The crowds became violent and threw petrol bombs at the police...
人群变得狂暴起来，并向警察投掷汽油弹。

by

prep. 在…旁边，表示方式，由于，经过；adv. 经过，表示保留或保存时用，短暂拜访；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

requisition

n. 征用，（财产或材料的正式）征用令，申请书；vt. 征用，征发；

例句
...a requisition for a replacement photocopier.
更换影印机的授权书