Then he heard a clanking noise deep down below.

接着他听见地下深处传来一阵叮当声。

youdao

Polyacrylamide hydrogel injected into the loose connective tissue below the deep temporal fascia could spread down to the cheek.

注入颞筋膜下疏松结缔组织中者，充填物可经颧弓深面再向前沿面颊脂体蔓延至颊部。

youdao

It was a cold, clear night, and the village lay under deep snow. Bright, icy stars shone from a dark sky down on the silent whiteness below.

这是一个寒冷而晴朗的夜晚，厚厚的积雪铺满了整个村子。明朗清亮的星星在黑色的夜空中俯照着这片寂静的白色大地。

youdao

Things get murkier still when oil companies drill deep below the surface of the ocean floor, since even robots can't go down there to see what's going on.

CNN: John D. Sutter