Pentone
缬烯炔, 异戊烯炔
🗣️ 情景例句
The longer the words the better.
单词越长越好。
The camera is out of order.
这照相机出毛病了。
Robert was delighted to see me and equally pleased with my little gift.
罗伯特见到我很高兴，对我的薄礼也感到满意。