Pdsr
abbr. Principal Director of Scientific Research 科研部主任
🗣️ 情景例句
There are abundant free materials available on the internet.
因特网上有丰富的免费资料提供。
Could you speak slower?
你能说得慢一点吗？
It's a small blue case and it's got a zip.
是只蓝色的小箱子，上面有拉链。