- 区别： 距离：this / these一般用来指时间或空间上较近的人或物；而that / those常指时间或空间上较远的人或物。例如：“This is a pen and that is a pencil.” 指代顺序：this / these可指后面要讲到的 …
· Delivery has failed to these recipients or groups的意思是邮件发送失败，未能成功投递给这些收件人或邮件组。 详细解释： 1. 邮件投递失败的含义 当你在发送邮件时，如果出现“Delivery …
What are these? They are basketballs. 这些是什么？它们（这些）是篮球。 不可以用these are 来回答，语法上是错误的。 these是指示代词，this的复数形式。在句首时做主语，用人称代词的主格they …
"those / these" are determiners and are used before nouns to refer to a particular group of things / people, e.g. these people / those rules / those buildings. Update: 题主问的是What are those? 然后 …
区别是this is 后面只能跟单数,如an appe ,a book。 而there are后面必须跟复数,如 two books,three apples,many apples。 this is 一个+ 可数名词 的单数，these are 一些+可数名词的复数+s these …
