■ part of

part of 前面不用 a。

• Part of what I'm searching for is a reason for that slowing.我正在查找的问题当中，一部分就是要弄清楚进度因为什么原因慢了下来。

• apart from
• apology
• apparent
• appeal
• appear
• apply
• appraise
• appraise 与 apprise
• appreciate
• apprise
• approve
• approve of
• approve 与 approve of
• a quick study
• archive
• arise
• arise, rise 与 arouse
• arm
• arms
• around
• arouse
• arrival
• art
• as
• as