with the naked eye
常见例句
- Instead, even objects big enough to be seen with the naked eye can take on slippery quantum properties.
甚至大到用肉眼也可看见的物体也有一些量子性质。 - Phytoplankton might be too small to see with the naked eye, but they are the foundations of the ocean food chain, ultimately capturing the energy that sustains the seas' great beasts such as whales.
尽管浮游植物的个头小得无法用肉眼进行观察，但它们却是整个海洋食物链的基础。 鲸鱼等大型海洋生物的生存归根结底都要依赖于它们所捕获的能量。 - Currently this star is too faint to be visible with the naked eye, but over the next few months it will start climbing in brightness until it becomes one of the brightest stars in this constellation.
通常这颗恒星亮度非常微弱，因而不能用肉眼直接观察到，但是在接下来的几个月中，它的亮度将不断攀升，直到成为鲸鱼座中最明亮的恒星之一。 - For example, when it's visible, Venus is so bright it can be easily spotted with the naked eye.
MSN: Search - The International Space Station is the biggest orbiting outpost ever built and can sometimes be seen from Earth with the naked eye.
NPR: Soyuz Capsule Docks With Space Station 返回 with the naked eye