BBC在线收听下载:俄罗斯与土伊协议扩大叙利亚停火范围

短语讲解：

1. German police have freed a man detained on suspicion of carrying out the deadly attack on a Christmas market in Berlin, saying they have insufficient evidence to link him to the crime.

on suspicion of 有嫌疑
例句：She' s been arrested on suspicion of spying.
她因涉嫌间谍活动而被捕。
carry out 进行; 执行; 完成; 抬出去
例句：No matter what we do, we must carry out our duties.
无论干什么工作,我们都应履行自己的职责。

2. A memorial service has being held in Berlin in honor of the victims.

in honor of 为了向…表示敬意
例句：They gave a party in honor of John.
他们举行宴会招待约翰。

3. Officials in Guinea say a former head of the presidential guard who was wanted in connection with a massacre has been arrested in the neighboring Senegal.

in connection with 与…有关，连同
例句：He was in detention in connection with the bribery affair.
他因与贿赂事件有牵连而被拘留了。

4. The Saraya tribe has called for a dialogue.

call for 要求; 需要
例句：Different circumstances call for different tactics.
不同的情势需要不同的策略。