The tipping point for so many people is the more constant concern of putting food on the table and providing for a family.
对许多人来说，临界点就是他们越来越担忧自己能不能有足够的食物来供养家庭。
2
And when it comes to tipping, they just leave some money on the table.
而说到给小费，他们通常留点钱在桌上。
3
Many table manners evolved out of practicality. For example, it is generally impolite to put elbows on tables, since doing so creates a risk of tipping over bowls and cups.