Definition
the major part or most of something.
大部分
The bulk of this company's revenue comes from software sales.
這家公司的大部分收入來自軟體銷售。
He devoted the bulk of his time to researching this issue.
他將大部分時間投入到研究這個問題上。
The bulk of the museum's collection comes from private donations.
博物館的大部分藏品來自私人捐贈。