一位名叫谢伟的科学家说，鲸落可能是最近才发生的，需要长期观察。

A scientist named Xie Wei says the whale fall might be quite recent and needs long-term observation (观察) .

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我从未确认过谢卫山(笔名：谢伟山)为我的全球合伙人。

Ihad never confirmed Xie Weishan (Pseudonym: Xie Weishan) as my global partner.

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上海同济大学的铁路专家谢伟达(音)说修建铁路本身是最容易的。

Xie Weida, a railway expert at Shanghai's Tongji University, says building the railway itself may be the easiest part.

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