美洲国家组织定期召开成员国会议讨论区域问题。

The ___OAS holds regular meetings for member countries to discuss regional issues.

我奶奶65岁时开始领取老年保障金。

My grandmother started receiving ___OAS benefits when she turned 65.

美洲国家组织的广播设备非常先进。

The broadcasting equipment in the ___OAS is very advanced.