Perlit
波利特铸铁, 珠光体铸铁
🗣️ 情景例句
Come on in, Dad.
请进来 ，爸爸。
The worker is pounding steel pipes to mend the leakage of water.
管道工为了修缮漏水而敲打着下水道的铁管。
However, he had at last been allowed to send a fax in which he informed the editor that the he had been arrested while counting the 1,084 steps leading to the fifteen-foot wall which surrounded the president's palace.
不过，他终于获准发回了一份传真。在传真中他告诉编辑，就在他数通向15英尺高的总统府围墙的1，084级台阶时，被抓了起来。