The exigencies of a situation or a job are the demands or difficulties that you have to deal with as part of it.
例句
...the exigencies of a wartime economy.戰時經濟的緊急情況
英漢詞典釋義
n.
急切的需要；危急
The people have to accept the harsh exigency of war.人們要承受戰亂的嚴酷現實。Many people are forced by exigencies of circumstance to take some part in them.許多人由于境況所逼又不得不在某種程度上參與這種活動。
英英詞典釋義
Noun
1. a pressing or urgent situation;
"the health-care exigency"
2. a sudden unforeseen crisis (usually involving danger) that requires immediate action;