慢速英语:S.O.S. – In Other Words, Help!

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短语讲解：

1. What you are listening to is a call for help.

call for 去接（某人）;去取（某物）;需要
例句：Nervous economists call for more economic stimulus.
紧张不安的经济学家呼吁政府出台更多的经济刺激措施。

2. Sometimes, backronyms come from outdated language.

come from 来自某处;出生于
例句：Where does it come from?
这究竟从哪里来的？