今日长难句：

It is certain that the Census procedures, which lump the online sales of major traditional retailers like Walmart with “non-store retailers” like food trucks, can mask major changes in individual retail categories．

可以肯定的是，人口普查局的程序将沃尔玛等主要传统零售商的在线销售与“非商店零售商”，比如流动餐车混为一谈， 可能掩盖了各零售门类的重大变化。

分析：

这是一个形式主语句，由于主语内容过长，借助形式主语it 并放在前，真正的主语是由that引导的从句放在后面。

形式主语：It

谓语：is

表语：certain

真正主语： that the Census procedures, which lump the online sales of major traditional retailers like Walmart with“non-store retailers"1ike food trucks, can mask major changes in individual retail categories．

从句中：

主语：the Census procedures

定语从句：which lump the online sales of major traditional retailers like Walmart with“non-store retailers"1ike food trucks

谓语：can mask

宾语：major changes

状语：in individual retail categories

核心词汇：

1. census n. 人口普查；人口调查

2.procedure n .程序；步骤

3.lump v. 混在一块；使成块状

【常见搭配】in a lump 一次全部地

lump ... with ... 把...和...混为一谈

4.retailer n. 零售商

【同根词】retail v. 零售；转述

【常见搭配】retail price 零售价

retail at...... 以......价格零售，零售价为......

5.store n. 贮存，贮备；商店，店铺 v. 储藏；存放

6.mask n. 掩饰；面具；口罩 v. 掩饰；戴面具

7.category n. 种类；类别

今日练习：

Separately America warned Mali against signing a deal with Wagner, reportedly worth almost $11m a month, for it to supply 1,000 mercenaries to train Mali’s army and protect officials.