Methanation
n. [化]甲烷化(作用)
??? 情景例句
How many brothers and sistes do you have?
你有多少個兄弟姐妹？
what's his native language?
他的母語是什么？
the fear of death is somewhat abject and ignoble.
如果怕死；就有點兒可憐又可鄙。