眼泪不仅仅能表达我们的情绪,它还覆盖和湿润我们的眼睛,阻止灰尘和微生物的侵入。最近科学家还发现,眼泪除了含盐之外,还含有其它成分。英国埃克塞特大学的科学家最近发现,泪水的表面有一层两个分子厚的膜,类似细胞膜,有点像肥皂泡的表面。眼泪膜是由许多生物分子组成的混合物 Tears not only express our emotions, it also covers and moistens our eyes and prevents the intrusion of dust and microbes. Recently, scientists also found that tears in addition to salt, but also contains other ingredients. Scientists at the University of Exeter in the UK recently discovered that the surface of tears has a two-membered, thick film resembling a cell membrane that resembles a soap bubble’s surface. The tear film is a mixture of many biological molecules