Pentadecalactone
[建] 十五酸內酯
??? 情景例句
Keep the change.
別找零頭了。
You make the failure complete when you stop strying.
不再努力之時，就是完全失敗之日。
she rang up her daughter and asked for her help in what she described as a little spot of bother.
她只得打電話向女兒求援，說她碰到了一點兒小麻煩。