1. The word 活动 in Chinese has a more broad meaning than its English equivalent. Sales are considered to be a type of 活动, as seen in 这附近的一家百货公司从今天开始有一个特价的活动 and 通常一家商店有特价活动的时候他们会希望很多客人去跟他们买东西.

2. is used to contradict the other speaker in 才不是这样.

3. Jokes in Chinese that aren’t funny are considered to be “cold” as in 你说的话很冷.