The president need not step down so long as the elections are held under international supervision.
只要选举在国际监督下进行，总统就不用下台。

2.chief executive 首席执行官

The programme of sell-offs has been implemented by the new chief executive.
新任总裁已经执行了抛售方案。

3.focus on 专注于

His administration's economic policy would focus on reining in inflation.
他的政府的经济政策将侧重于控制通货膨胀。

4.pay for 支付

Using a credit card to pay for an order is simplicity itself.
用信用卡支付订单再简单不过了。