in earnest

With a purposeful or sincere intent

正經的：帶有認真或堅定的目的的

settled down to study in earnest for the examination.

堅定決心認真坐下來復習準備考試

Serious; determined

堅定不移的；嚴肅的

“Both sides are deeply in earnest, with passions that approximate those of civil war”(&b{Conor Cruise O'Brien})

“雙方都很堅決認真，象是鼓足勁要打一場內戰”(&b{康納·克魯斯·奧布賴恩})