Polyanhydrides
[化] 聚酐类
🗣️ 情景例句
What power options are available? ( steering, brakes, windows.... )
（这种汽车）有中控系统吗？
Better say nothing than nothing to the purpose.
与其说话不中肯，不如一言不发好。
she rang up her daughter and asked for her help in what she described as a little spot of bother.
她只得打电话向女儿求援，说她碰到了一点儿小麻烦。