conundrum= a confusing and difficult problem or question受裹，復雜難解的問題枚碗，可數(shù)
How to balance development and environmental protection is a conundrum faced by many modern governments.
utilitarian實用主義的（altruistic是“無私的”的意思，注意二者的區(qū)別）?
Those working on a construction site（建筑工地）should wear utilitarian clothes that won’t interfere with their work.
endorse= declare one’s public approval or support of sth，（公開地）支持或贊同某事物硫麻，vt
This candidate has been endorsed by many prominent GOP members.
impulse= a sudden strong and unreflective（未經反思的）urge or desire to act.沖動弟断，可數(shù)
Kant noted that people’s seemingly altruistic behavior is in fact motivated by their secret impulse of self-love.?
in the same vein=likewise=similarly
Mike believes people can only benefit themselves by helping others. In the same vein， Joe argues that only by serving others can the whole society develop.
be discontented with sth對某事物不滿
Joe is discontented with his loneliness but he is not willing to spare any time to find a girlfriend.
tiresome= causing one to feel bored or annoyed.令人厭倦的
Joe posts many selfies and remarks on WeChat moments every day, which makes him a tiresome person.
Juvenile作adj除了可以作“青少年的”講龄恋，還可以作“childish疙驾、immature”講
Joe’s mother-in-law thinks Joe is very juvenile and talks too much.
don=wear穿（戴）上，vt
Don’t don rose-colored classes when considering your own situation.?
