n.打桩,打桩工程
v.堆起( pile的现在分词 ),堆叠,放置,装入
He was piling clothes into the suitcase.
他在把衣服一件件叠放进手提箱中。
Problems were piling up at work.
工作中的问题越积越多。
Mail was still piling up at the office.
办公室里的邮件仍在往上堆。