聚乙烯

This result is consistent with some other observation, e. g. by Keyghobadi on Parnassius smintheus.

此结论与Keyghobadi在高山蝴蝶上的观察相一致。

They are sitting up doing a task they learned and they are working very hard at doing their best, Dinges said.

他们都是坐正，在做著一件他们已学会的工作，而且他们很努力把工作做到最好。