against [əˈɡenst]

prep.相反，反对，靠，以…··为背景，参照

例句：

The court's ruling is a step forward in the struggle against both corruption and official favoritism.

法院裁决是对腐败和公务偏袒斗争的一个进步。

(此处against意为“反对"。)

It has not occurred against the background of general commodity-price inflation.

这并不是在商品价格普遍上涨的背景下发生的。

(此处against意为"以……为背景"。)

长难句：

Such behavior is regarded as "all too human", with the underlying assumption that other animals would not be capable of this finely developed sense of grievance.

译文：这种行为被看作是“人之常情"，其潜在假设是其他动物不具备这种高度发达的不满意识。