记日记；记记录；记笔记。

Keep a diary; maintain a record; keep notes.

此外，你还要坚持记日记。

In addition, you must keep a diary.

当我是小女孩时我常记日记.

As a young girl I used to keep a diary.

每天记日记是非常困难的.

It is difficult to keep a diary every day.

我不明白你为何要记日记.

I do not see why you shall keep a diary at all.

他不知道怎么用英语记日记。

He doesn't know how to keep a diary in English.

我想保持记日记.

I want to keep a diary.

我每天记日记.

I keep a diary every day.

第三，我坚持每天记日记来练习写作。

Third, I keep a diary every day to practise my written English.

她记日记来追踪她的水摄入量。

She keeps a diary to track her water intake.