一个可生物分解的外壳可以给环境减轻压力，据科学家所说。
A biodegradable cover can offer some relief for nature, according to the scientists.
据科学家所说，这头史前的海洋爬行类比座头鲸还长，它的牙齿有黄瓜那么大。
The massive prehistoric sea reptile was longer than a humpback whale and had teeth the size of cucumbers, scientists say.
据科学家所说，一位政客在此类环境下会降低他们讲话的音调，因为他们想在同僚前坚持自己的立场。
A politician may lower their pitch range in this context because they want to hold their own among perceived equals, said the scientist.
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