lose track

To forget one's train of thought or temporarily misplace an item or its place in a sequence.

日本語の意味

考えや話の流れを見失う（思考が途切れる） / 物や順序中の位置を一時的に見失う

I sometimes lose track of where I put my keys when I'm in a hurry, so now I leave them in a designated bowl.

急いでいるときに鍵をどこに置いたか忘れてしまうことがあるので、今は決まった小皿に置くようにしている。

意味（1）

To forget one's train of thought or temporarily misplace an item or its place in a sequence.

With all that had happened, she had lost track of the time.

loses track

（ present singular third-person ）

losing track

（ participle present ）

lost track

（ participle past ）

lost track

（ past ）