微小的东西 meaning in Chinese

minikin
splinter

These microscopic critters are essential contributors to our good health
这些微小的东西对于我们的健康是有益的。
African elephants have two fingerlike features on the end of their trunk that they can use to grab small items . ( asian elephants have one
非洲象的鼻子末端有两个手指状的东西可以用于抓取微小的东西（亚洲象只有一个。）
The scientists who attend that conference will no doubt commiserate about the inherent difficulty of engineering a relatively puny stretch of dna to work reliably within a cell that is constantly changing
即将参加这场会议的科学家到时便能体认，要让dna这麽微小的东西在细胞中稳定地运作，是多麽困难的事情，毕竟细胞是不断在变动的。