Polyether ketone ketone (pekk)
[化] 聚醚酮酮
🧩 词语组成解析
n. [化]聚醚,多醚
ketone
['ki:toʊn]
n. 酮;
ketone
['ki:toʊn]
n. 酮;
🗣️ 情景例句
Well, it's nice to have you with us again.
噢 ，非常高兴你们又来了。
Till we meet again.
后会有期。
After the accident, all the lines and taps were clearly marked and new people joining the workforce were given a talk on safety before they started work.
火灾过后，所有的管道和龙头都被标得一清二楚，而且加入劳动队伍的新工人在开始工作之前要接受有关的安全教育。