anonymous news sources的用法和样例：
例句
- It was difficult to follow a Woodward-Bernstein story because the reporters often relied on anonymous sources.
要跟进伍华德和柏恩斯坦所写的新闻很困难，因为他们依赖的往往是匿名消息来源。 - At the moment, GM is only considering the option, according to anonymous sources, with nothing set in concrete yet, Reuters reports.
目前，通用汽车是唯一考虑的选择，根据匿名消息来源，没有确定具体然而，路透社报道。
