对着这种亮光,是很难看见什么东西似的.It is difficult to see anything against this bright light.它们开始的时候也很难被察觉, 因为它们是肉眼很难看见的.They are also hard to spot initially, as they can't be seen with the naked eye....

“难看见”的英语可以翻译为：invisibility ...