Jiānzhí ɡōnɡzuò hěn fèi shíjiān hé jīnɡlì.

兼职工作很费时间和精力。

A part-time job takes a lot of time and energy.

Notes:

兼职(jiānzhí): part-time

工作(ɡōnɡzuò): job, work

很(hěn): very

费(fèi): spend, take

时间(shíjiān): time

和(hé): and

精力(jīnɡlì): energy

Example:

A：你有兼职工作吗？

     Nǐ yǒu jiānzhí ɡōnɡzuò mɑ？

     Do you have a part-time job?

B：没有。兼职工作很费时间和精力。

     Méiyǒu. Jiānzhí ɡōnɡzuò hěn fèi shíjiān hé jīnɡlì.

     No. A part-time job takes a lot of time and energy.