He lost the race by the narrowest of margins.

他以极小的差距在赛跑中落败。

Fame, like a river, is narrowest at its source.

名声如江河，开头最狭窄。

The bridge crosses the river at its narrowest point.

大桥在河的最狭处横跨河面。

At its narrowest point it is the width of a pound coin.

其最窄处仅为一英镑硬币的厚度。

The paradigm is in its narrowest sense a set of rules.

范例，就其最狭隘的意义来说，就是一组规则。