You can't be too careful

can't be too careful很容易误以为是“不能太小心”，实际意思完全相反。牛津词典：

Used to warn sb that they should take care to avoid danger or problems 无论怎样小心也不会过分；越小心越好

Don't stay out in the sun for too long─you can't be too careful.

别在太阳底下待得太久，你得尽量小心。

其实应该这样理解，too careful是”过于小心“的一种状态，加上前面的否定can't be，就是不可能达到”过于小心“这种状态，也就是你怎么样都算不上”过于小心“，所以你得多加小心。

锤子手机宣传视频里有一句“No detail, can be too detailed." 中文字幕是：“所有的细节，都决定成败。”同样可以这样理解：没有任何一个细节，可以达到“优化得太过”的状态，细节的优化是永无止境的。欣赏一下锤子手机的宣传语和翻译：

Simplicity, is hidden complexity.

简约，源自隐藏的精密

The essence of flat, is super curved.

平坦的本质，是极致的曲面

Uncomfortable, is the new comfortable.

不适感，导致了全新的舒适

Right is right. Left is also right.

让你的左右，不被产品左右

No detail, can be too detailed.

所有的细节，都决定成败