内科internal/general medicine; internal medicine
密切close; build/establish/forge close links with
密码password; cipher/secret code
平方the second power; square metre
暖气central heating system; heating equipment
热心enthusiastic; be warm-hearted
燃烧burn; be consumed with strong emotion, desire, etc.
男女man and woman; sons and daughters
秘书secretary; duties of a secretary
面临confront; be confronted with