Retentivity
n. 保持力, 记忆力, 顽磁性\\n[化] 剩余磁化强度
🗣️ 情景例句
You've been a very helpful.
你帮了大忙。
Every salesman boasts of his own wares.
老王卖瓜，自卖自夸。
He thought they needed to know the direction to it.
它们还需要知道去那里的方向。