as such困难

(48) The gardens of the homeless, which are in effect homeless gardens, introduce form into an urban environment where it either didn’t exist or was not discernible as such.

（48）无家可归者的花园实际上也是无家可归的花园，它们把一种形式引入了城市环境，而在这样的环境中，这种形式要么原本不存在，要么无法被辨识出来。

As such, it needed to appreciate the economic realities, the social contexts and power relations in which each epoch stood.

因此，历史需要认识到每个时代所处的经济现实、社会背景和权力关系。