Pentadecene diacid
[化] 十五烯二酸; 十五碳烯二酸
🧩 词语组成解析
n. [化]二酸\\na. [化]二价酸的, 二酸的
🗣️ 情景例句
There's always a friend around when you need one.
当你需要朋友帮忙的时候，总会有朋友在你身边的。
And the problems that some of us have had in the past year.
和去年我们一些人遇到的问题。
Once there was an old tiger.
从前有一只年迈的老虎。