Delrin
迭尔林(聚甲醛树酯)
🗣️ 情景例句
By the way, will we be able to get a refund on this cancellation?
顺便问一下，我们取消后可拿回定金吗？
Did you go to the concert yesterday?
你昨天去听音乐会了吗？
The men were now obliged to try once more.
工人们只得再来一次。