写作构思万能理由：
1、方便：convenient\convenience
2、效率：efficient\efficiently\efficiency
3、节省和浪费：save time\money\space; economical, thrift
waste time\money\space; costly, lavish
4：人的心理健康：independent, cooperative, competitive,
considerate, confident, creative, sociable,
perseverance ; selfish, isolated, conservative
5、人的身体健康：health, disease, strong, strength, energetic
6、娱乐：colorful, pleasure, joy, recreation, entertainment, relax
tired, boring, lonely
7、环境：environment, pollute, poisonous, dirty
8、安全和危险：safe, danger, risk
9：经验：experience, social experience, enter the society
10、人际：humane, fair, unfair, help, assist, freedom, freely