Delrin
迭尔林(聚甲醛树酯)
🗣️ 情景例句
Well,
噢，
Necessity and oportunity may make a coward valient.
需要和机会可能使懦夫变成勇士。
It's a very old castle. It is the oldest one in Britain.
这个城堡很古老，它是英国最老的了。