Polyarylester
聚芳酯; 聚芳酯
🗣️ 情景例句
It's getting late. Please excuse me, but I must leave right away.
时间不早了。对不起，我得赶紧走了。
All things are difficult before they are easy.
凡事必先难后易。
I'm fine, thanks.
很好，谢谢。