I'll lend you the letters but they're for your eyes only.

我愿把这些信借给你，但只准你一个人看。

This document is for your eyes only.

这份文件只让你过目。

For your eyes only, I never need to hide.

唯有你能看，我不需要躲藏。

For your eyes only, the nights are never cold.

唯有你能看，夜晚从不凄冷。

This will occupy your mind with a simple activity so there's no other way for you to read than to use only your eyes - which is the true secret of speed reading.

这会让你的思想注意在简单的事情上，这时你除了用眼睛就没法用其他的方式阅读了，这是快速阅读最有效的诀窍。