Pitprop
n. 坑木, 坑道支柱
🗣️ 情景例句
She's off today.
她今天休假。
Try to be there by 8:15 the airport will be crowded.
尽量在8点15分以前赶到那里，到时机场会很拥挤的。
One moring she was working at her desk in the library when a boy came in.
一天早上，她正在图书馆里伏案工作，这时，一个男孩走进来。