虽然微塑料具体会对我们身体造成怎样的伤害尚不明确，但微塑料本身和他们吸收了大量的有害细菌这一事实让我们忧心忡忡。

Though the precise harm to our bodies remains unknown, concerns include the microplastics themselves, as well as the fact that they absorb a range of harmful bacteria.

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这是否有助于恢复国内稳定尚不明确。

It was unclear whether this would help restore calm.

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上海科技馆的动机尚不明确。

The Shanghai museum's motive here is unclear.

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