To appear dark or threatening, such as the sky.

黑沉沉看上去黑沉沉，具有威胁性，比如天空。

youdao

The nearby mountains appear dark with vegetation.

附近山区出现黑暗与植被。

youdao

So a dark horse may appear.

所以，也许会出现黑马也说不定。

youdao

The night is dark, even the stars appear without light.

夜更暗了，连星星都显得无光。

youdao

The night is dark, even the stars appear without light.

夜更暗了，连星星都显得无光。

youdao