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。