英语翻译请帮我翻译一下1.买东西时 this 和 this one 有什么区别let's not studylet's

英语翻译
请帮我翻译一下
1.买东西时 this 和 this one 有什么区别
let's not study
let's not go there
let's go swimming
let's go to the supermarket
let's not buy this
let's play soccer
let's not eat dinner
let's not burn
let's play
let's party
let's go to his house
let's not sing
let's call him
let's work
let's drive
let's read
let's not fight
let's do it