Delrin
迭尔林(聚甲醛树酯)
🗣️ 情景例句
How do you rate it?
你给它的评价是什么？
Do you ever play basketball after school?
你曾经在放学后打篮球吗？
What is more, this information line operates 24 hours a day.
而且，这种"问讯线路每天工作24小时。