Polymethylation
[化] 聚甲基化; 聚甲基化作用
??? 情景例句
Oh, Susan, thank you so much
噢 ，Susan ，謝謝你。
A hero is known in the time of misfortune.
時勢造英雄。
She finished it at half past nine. She went to bed before a quarter to ten.
30 她完成了作業(yè)。她9：45之前上床睡覺。