B2 记日记／记账／作记录（等等）
to make a regular record of events or other information so that you can refer to it later
I've kept a diary for twelve years now. 到现在我记日记已有12年了。
Keep an account of how much you're spending. 记下你花多少钱。
We kept an account of all the accidents that occurred at that spot.
She is keeping a record of everyone who enters or leaves the building.
I keep a journal where I record everything I do in a day.
See also: keep verb (CONTINUE TO HAVE)