Once language starts to develop from about age 2, they do have a system for symbolic representation and can talk about things which aren't in their immediate environment including the past.
一旦语言从2岁左右开始发展，他们就有了一个符号表征系统，可以谈论过去和现在环境之外的事情。
2
Their system seems to combine the two ideals of strong government and proportional representation.
他们的体制似乎同时具有强有力的政府与比例代表制这两种理想状况。
《柯林斯英汉双解大词典》
3
The proportional representationsystem was widely blamed for two inconclusive election results and a year of political stalemate.