Microplastics

（重定向自Plastic pellet）

Polyethylene based microspherules in toothpaste

Microplastic fibers identified in the marine environment

Microplastics are small plastic particles in the environment that are generally smaller than 1 mm (0.039 in) down to the micrometer range. They can come from a variety of sources, including cosmetics, clothing, and industrial processes. Two classifications of microplastics currently exist: primary microplastics are manufactured and are a direct result of human material and product use, and secondary microplastics are microscopic plastic fragments derived from the breakdown of larger plastic debris like the macroscopic parts that make up the bulk of the Great Pacific Garbage Patch. Both types are recognized to persist in the environment at high levels, particularly in aquatic and marine ecosystems. Because plastics do not break down for many years, they can be ingested and incorporated into and accumulated in the bodies and tissues of many organisms. The entire cycle and movement of microplastics in the environment is not yet known, but research is currently underway to investigate this issue.

单词	Plastic pellet
释义	Plastic pellet 原声例句看广告学英语 A factory then binds the compounds and turns them into plastic pellets. 在另一间工厂提炼品再被加工，变成了一粒粒的塑胶。 PBS英语讯息 The ship had 25 tons of nitric acid and other chemicals on board, including tons of plastic pellets. 这艘船上有25吨的硝酸和其他化学物质，其中包括数吨的塑料颗粒。 PBS趣味科普 In the form of little plastic pellets like this, that's enough plastic to fill more than 5000 Giza pyramids. 以这样的小塑料颗粒的形式，这些塑料足以填满 5000 多个吉萨金字塔。 BBC 听力 2012年11月合集 Serious questions have been asked about the president's security after a young man in camouflage gear pushed through a crowd and fired several plastic pellets at him at close range. 一名身穿防护装置的年轻男子从人群中冲出来，对总统近距离发射几颗塑料球，这使人们认真质疑总统的安全问题。此间的地球 So an ethane cracker is an absolutely enormous facility that uses a tremendous amount of energy to it's called crack the ethane molecules into ethylene, and then turn them into these tiny little plastic pellets. - 所以乙烷裂解器是一个绝对巨大的设施，它使用大量的能量来将乙烷分子裂解成乙烯，然后将它们变成这些微小的塑料颗粒。英语百科 Microplastics （重定向自Plastic pellet） Microplastics are small plastic particles in the environment that are generally smaller than 1 mm (0.039 in) down to the micrometer range. They can come from a variety of sources, including cosmetics, clothing, and industrial processes. Two classifications of microplastics currently exist: primary microplastics are manufactured and are a direct result of human material and product use, and secondary microplastics are microscopic plastic fragments derived from the breakdown of larger plastic debris like the macroscopic parts that make up the bulk of the Great Pacific Garbage Patch. Both types are recognized to persist in the environment at high levels, particularly in aquatic and marine ecosystems. Because plastics do not break down for many years, they can be ingested and incorporated into and accumulated in the bodies and tissues of many organisms. The entire cycle and movement of microplastics in the environment is not yet known, but research is currently underway to investigate this issue.
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