One eof the more credible theories seems to belong to Dr Richard McIver, who centers his explanation on the presence of methane hydrate.
理查德·麦基弗博士的理论似乎更可靠，他将解释重点在于甲烷水合物的存在。
One eof the more credible theories seems to belong to Dr Richard McIver, who centers his explanation on the presence of methane hydrate.
理查德·麦基弗博士的理论似乎更可靠，他将解释重点在于甲烷水合物的存在。
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