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
Perfect! Alexandra will love it!
太好了！ Alexandra会喜欢的！
He has been to America.
他去过美国。[曾经有过的经验]
By 1820 the population of New York had grown to about 125,000, making it the largest city in the USA.
到1820年，纽约市的人口增长到12。5万人左右，使它成了当时美国最大的城市。