Polyamide
[化] 聚酰胺
🗣️ 情景例句
He appeared ill at ease at the party.
他在宴会上显得很拘谨。
If he had only had enough money,he would have bought that house.
如果他仅仅有了足够的钱，他就会买那房子。
Since then, they have been trying to find out how the fire began.
从那时起，他们一直试图找出起火的原因。