the first postulate 首先的假定
The first postulate of a user-centred theory is that the built environment exists to support the activities of users that it shelters.
以用户为中心的理论的首要前提是，建成环境的存在是为了支持它所容纳的用户的活动。
However, Koch had to abandon part of his first postulate when he discovered that healthy people could carry the germs of certain diseases and yet show no symptoms.
然而科赫后来发现，一些健康的人能毫无症状地携带某种特定致病菌，而且一些人暴露于狂犬病菌却依然没有患上狂犬病。
First, we must postulate that if souls exist, they must have some mass.
第一，我们必须假定灵魂存在，他们必须保有物质。
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