Hexamethylene tetramine
[建] 胱氨酸
?? 詞語組成解析
n. [化]環己
[醫] 羥化四甲銨
??? 情景例句
You got that part right.
你們這一部份猜對了。
Not at all.
當然可以。（當然不介意）
Such inns as there were generally dirty and flea-ridden;
那里的小客棧一般都很骯臟，而且跳蚤猖獗。