kick-off : the begining of something 事物的開始
Candidates kick off their campaigns with a speech. 候選人常以演講的形式開始他們的競選
Students kick-off the semester with a party! 學生們在開學之初舉辦了一個派對
up someone's sleeve:someone's secret 某人的秘密
People dislike those who often have something up their sleeve. 人們不太喜歡那種什么事都要保密的人
The wife has something up her sleeve for her husband's birthday party。這個妻子秘密的為她丈夫舉辦了生日聚會