Pentadecanolide
[建] 十五酸内酯
🗣️ 情景例句
I see him on the train every day but we are not on speaking terms.
我每天都在火车上见到他，但彼此没有说过话。
Nothing is difficult to the man who will try.
世上无难事，只要人肯试。
I'm not sure that this conference is as good as last year's.
我确信这次会议不如去年的会议精彩。