Pek
[化] 聚醚酮
🗣️ 情景例句
I'm afraid the cardboard boxes are not strong enough for transport by sea.
我担心这种纸箱，用于远洋运输，不够结实。
Don't look wise.
别自作聪明。
The students declared against cheating.
学生们表示反对作弊。