Mdm
abbr. 工程数据管理（Master Data Management）；维修诊断手册（Maintenance Diagnostic Manual）
🗣️ 情景例句
for a long time,
很久了，
How much is it?
多少钱？
Though these large machines still exist, many of their functions have been taken over by small powerful personal computers, commonly known as PCs.
虽然这种大计算机仍然存在，但它们的许多功能已被体积小但功能齐全的个人电脑——即我们常说的PC机——所代替了。