それをよくよく覚えています。

that (indicating an item or person near the listener, the action of the listener, or something on their mind); it; that time; then; there (indicating a place near the listener); you

indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.

nicely; properly; well; skillfully; skilfully; frequently; often

to memorize; to memorise; to commit to memory; to learn by heart; to bear in mind; to remember; to learn; to pick up; to acquire; to feel; to think; to regard