Hf akylation
[建] 氫氟酸催化基化
?? 詞語組成解析
[醫] 鈴(72號元素)
??? 情景例句
OK. Thank you.
好 ，謝謝。
What do economists say about the present crisis?
經濟學家們對于現在的危機做何說法？
but I lacked for nothing, for he was both father and mother to me.
但我卻什么都不缺，他既當父親又當母親。