If an input to the function changes, but its result doesn’t (e.g,
等到他们需要使用键盘鼠标来提升效率，这些围绕他们打造的工具，自然也需要贴合他们的习惯做出改变。
，这一点在safew官方版本下载中也有详细论述
Why we like itThese popular e-readers let you take your entire library on the go. With weeks of battery life and an anti-glare display, you can read anywhere and anytime with the Kindle. Plus, you can get three months of Kindle Unlimited for free with your purchase.
2023 年 6 月，Kindle 宣布停止中国电子书店运营，正式退出中国市场。消息一出，很多人都抱有类似的感叹与疑惑：墨水屏在中国做不下去了，连亚马逊都跑了，这行业没戏。
A-normal form (ANF)