•Give sb tit for tat (idiom) -
To give someone something equal to what was given you.（以牙還牙，針鋒相對）
Examples:
1. They gave me the same kind of difficulty that I gave them. They gave me tit for tat.
2. He punched me, so I punched him. Every time he hit me, I hit him. I just gave him tit for tat.
•Give sb a taste of their own medicine（idiom） -
To do the same bad thing to someone that they have done to you. （以其人之道還治其人之身）
Examples:
1. I'm glad somebody decided to give them a taste of their own medicine.
2. This team likes to play rough, so let's go out there and give them a taste of their own medicine!
•Spell sth out (phrasal verb) –
To make explicit; to specify in detail.（清楚說明）
Examples:
1. Be assertive and spell out exactly how you feel.
2. The government has so far refused to spell out its plans.
•Fall prey to sb/sth (idiom) -
To be harmed or affected in a bad way by someone or something. （深受…之害，成為…的犧牲品）
Examples:
1. Police fear that more senior citizens could fall prey to the thieves.
2. Some of his friends fell prey to drugs.
•Habit is second nature (proverb) -
That which has been turned into a habitual practice will be done with little or no conscious effort.（習慣是第二天性，習慣成自然）
Examples:
1. Habit is a second nature, so teachers often remind us to make a good habit.
2. Sorry, ever since I worked as an editor I can't help but pick out typos and grammatical mistakes. Habit is second nature!
