01
今日长难句
This means that a DNAdatabasemay have a lot of data from someregionsand not others, so a person's test results may differdepending onthe company thatprocessesthe results.
02
词汇解析
database n. 数据库；资料库
region n. 地区；区域
depend on 取决于；依靠
process v. 处理；加工
03
结构分析
STEP 1 确定所有谓语动词
means
may have
may differ
processes
STEP 2-1 确定并列分句
并列分句1：
This means that a DNA database may have a lot of data from some regions and not others.
并列分句2：
so a person's test results may differ depending on the company that processes the results.
STEP 2-2 确定分句中从句
宾语从句：
a DNA database may have a lot of data from some regions and not others.
定语从句：
processes the results.
STEP 3 确定各句主干
并列分句1主干：
This means (that...)
并列分句2主干：
a person's test results may differ
宾语从句主干：
a DNA database may have a lot of data
定语从句主干：
processes the results
STEP 4 确定修饰成分
1. from some regions and not others
2. depending on the company
04
参考译文
这意味着某个DNA数据库可能拥有来自某些地区的大量数据，但缺少其他地区的数据。因此，同一个人的检测结果就可能会因为处理结果的公司不同而有所差异。
