One is everyday failure of memory when you forget.

其一是日常记忆力下降，当你忘记的时候。

We've dealt right now with two sorts of failures of memory.

我们现在已经处理了两种记忆故障。

I could never quite decide whether this period was truly a blank, or if he was staging a failure of memory because he didn't want to talk about the premeditation of his crimes.

我始终无法确定这段时期对他来说是否真的是一片空白，还是他在刻意演绎记忆的缺失，因为他不想谈论他犯罪的预谋。