"under your belt" in Chinese (Simplified)
掌握有（经验、成就）
Definition
如果你有某事在你的腰带下，意思是你已经取得了它，或者那是你的经验、知识的一部分。
Usage Notes (Chinese (Simplified))
属于非正式口语，常和具体成就、经验年数等搭配。不用于消极经历，也不用于字面意义。
Examples
She has five years of teaching under her belt.
她有五年教学**经验**。
Once you have a degree under your belt, it is easier to get a job.
一旦你有了学位**在手**，找工作就更容易。
He has many successful projects under his belt.
他有许多成功的项目**在手**。
After a few small wins under your belt, you’ll feel more confident.
有几次小胜利**在手**之后，你会更有信心。
With two marathons under his belt, he decided to start coaching others.
有两场马拉松**经验**后，他决定开始指导别人。
You already have a few big projects under your belt—that’s impressive!
你已经有几个大项目**在手**了，太厉害了！