Pericondensed polycyiclic
[建] 包缩合多环物的
🗣️ 情景例句
He's been here for years, he should know the ins and outs of the job by now.
他在这里已经好多年，现在理应熟悉各方面的工作了。
False friends are worse than open enemies.
明枪易躲，暗箭难防。
Before long, the noise dropped completely and the boat began to drift gently across the water.
没过多久，噪音便彻底消失，快艇开始在水面上慢悠悠地漂流。