Hexylacetic acid
[建] 辛酸
🧩 词语组成解析
🗣️ 情景例句
She's nine years old.
她九岁。
That man is a teacher,isn't he?
那个人是位教员，对不对？
These friendly dogs, which were first brought from Asia, were used as watchdogs even in Roman times.
那些最先从亚洲引进的狗，待人友好，早在罗马时代就给人当看门狗了。