句子结构分析Scientists are defying government experts to warn that babies are being exposed to high levels of aluminium in formula milk,which they claim could damage their health.科学家不认同政府专家的观点,警告大家婴儿所喝

句子结构分析Scientists are defying government experts to warn that babies are being exposed to high levels of aluminium in formula milk,which they claim could damage their health.科学家不认同政府专家的观点,警告大家婴儿所喝
句子结构分析
Scientists are defying government experts to warn that babies are being exposed to high levels of aluminium in formula milk,which they claim could damage their health.科学家不认同政府专家的观点,警告大家婴儿所喝的配方奶中,铝元素含量过高,这将会损害他们的健康.
最后which引导的那个非限制性定语从句中为啥出现了2个谓语动词claim、could damage,我试着改过来,they claim （that） which（指formula milk） could damage their health.怎么which就跑到claim的宾从中作主语去了,不是这里应该在定从中作主宾表这些的吗?

句子结构分析Scientists are defying government experts to warn that babies are being exposed to high levels of aluminium in formula milk,which they claim could damage their health.科学家不认同政府专家的观点,警告大家婴儿所喝
你确实很善于思考!
划分句子成分可以帮助理解你的问题：
【Scientists主语】【 are defying谓语】【 government experts宾语】【 to warn that babies are being exposed to high levels of aluminium in formula milk不定式短语,目的状语】,【which they claim could damage their health 非限制性定语从句】.
to warn 【that （babies主语）（ are being exposed to谓语）（ high levels of aluminium in formula milk宾语）宾语从句】
【which关系代词,从句主语】 【they claim插入语】 【could damage谓语】【 their health宾语】
可见,你问的这个句子中,they claim就是很常见的【插入语】.
The fish was seldom seen here before,which they say is strange.
常见的类似插入语：
you know/see
we all know/see
I know/see/think/feel
they believe/think/claim/consider/say
祝你开心如意!

which they claim could damage their health. 前应该是逗号，而不是分号的。
they claim类似于they think，可视为插入语的。
可以去掉的。刚才一找，还真发现不少这样的句子，如下面这句：This trend ,which we believe is still in its infancy, effectively began...

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which they claim could damage their health. 前应该是逗号，而不是分号的。
they claim类似于they think，可视为插入语的。
可以去掉的。

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