暗黒星雲: a type of interstellar cloud that is so dense that it obscures light from background stars; a dark nebula

(idiomatic, especially a child) to be on the verge of tears

encore! (please perform again)

an encore (extra performance)

Angkor (the ancient capital of the Khmer Empire, in northern Cambodia)

the dark, cruel side of a matter or situation / (Star Wars) the dark side of The Force

to use one's head

use one thing for many purposes / work someone hard

Angkor Wat

暗黒時代: a historical period where social disorder is so great due to war, disease, political disorder etc. that there is little or no cultural development; Dark Ages