Children should be given chores to do in order to teach them responsibility.
Mom said that I could go out and play after I did my chores.
n.人类（=human beings， mankind)；仁爱，慈悲
We should do things for the welfare of all humanity. =We should do things for the good of all mankind/ humans.
Mother Teresa was a woman of great humanity.
vt. & n.牺牲
Those martyrs sacrificed their lives for democracy.
Peter worked hard to build up his company at the sacrifice of his health.=Peter worked hard to build up his company at the cost of his health.
It depresses me that everything has changed.
John felt depressed knowing that his girlfriend had just dumped him.
The depressing movie made the audience cry.
Steve has been suffering from depression since his wife passed away.
Many businesses failed to live through the Great Depression of the 1930s.
The couple remained loyal to each other throughout their lives.
The boss thanked the retiring employee for his hard work and loyalty.
The government should not interfere in the stock market.
Linda never allows her personal feelings to interfere with her work.=Linda never allows her personal feelings to hamper her work.