Noun + 的 + 一部分
The noun phrase 一部分 (yī bùfen) means 'a part' or 'a portion' of something. It is used to indicate that something constitutes a fraction of a larger whole. For example, 作为圣诞的一部分 means 'as a part of Christmas.'
这只是计划的一部分,后面还有很多事要做。
Zhè zhǐshì jìhuà de yī bùfèn, hòumiàn hái yǒu hěn duō shì yào zuò.
This is only part of the plan — there's still a lot to do after this.
运动是健康生活的一部分。
Yùndòng shì jiànkāng shēnghuó de yī bùfèn.
Exercise is part of a healthy lifestyle.
他把一部分工资寄给了家里。
Tā bǎ yī bùfèn gōngzī jì gěi le jiālǐ.
He sent part of his salary back home.