translation.en: Here's a close-up picture, or this is actually a regular picture of a water hyacinth, and if you had really, really good vision, with your naked eye, you'd see it about that well.
translation.zh: 这是一幅特写，就是平常的 凤眼蓝的图片，假如你有很好的视力 肉眼就能看得同样清楚了