subtly

The impressive dissertation has subtly revealed a thought-provoking social phenomenon which is prevalent all over the world, which is __.

这篇令人印象深刻的论文敏锐地反映了一种全球盛行的发人深省的社会现象：__（中心词）。

The use of lightweight zinc cladding gives the upper storey a muted tone, texture and colour that subtly merges with the surrounding environment.

使用轻量的锌覆盖层为上层的楼层提供了柔和的色调、质地和颜色，使之巧妙地融入周围环境中。