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They postulated a 500-year lifespan for a plastic container.是什么意思？

They postulated a 500-year lifespan for a plastic container.

他们假定塑料容器的寿命为500年。

相关词汇
they postulated lifespan for plastic container

they

pron. 他/她/它们，人们，大家，政府，当局，她们；

postulated

v. 假定，假设( postulate的过去式和过去分词 )；

lifespan

n. （人或动物的）寿命，存在期，使用期，有效期；

for

prep. 为，为了，倾向于，关于，当作；conj. 因为，由于；

plastic

n. 塑料制品，〈口〉（使用）信用卡，整形，可塑体；adj. 可塑的，塑性的，受范的，柔软的，造型的，塑造的，给与形态的，塑料[塑胶]的，塑料[塑胶]制的，合成树脂做的，有形成力的，有创造力的；

container

n. 容器，箱，匣，集装箱，货柜；
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