BBC在线收听下载:卡斯特罗逝世 古异见组织哀悼期主动停止活动

短语讲解：

1. Activists say that several thousands of civilians have fled both to government and other rebel held areas.

thousands of 数千的
例句：A computer consists of thousands of components.
电脑由成千上万个部件组成。

2. The son of one of the key figures in the Iranian revolution has been sentenced to six years in jail for releasing a tape in which his father condemned the mass execution of political prisoners.

be sentenced to 被判处……
例句：It's unfair for me to be sentenced to spending my lifetime in poverty.
我一辈子要受穷这实在不公平。

3. All three are believed to belong to an Indonesian organization that supports the Islamic State group.

belong to 属于
例句：I belong to no party.
我不属于任何派别。