十三条公理定理编成口诀 两天之内

1、如果你这样养下去,你的清道夫会全死光的,清道夫不耐盐,养清道夫的缸里不能加盐,加盐很容易导致清道夫的死亡.
2、菠萝应该是地图咬的,地图很能吃,突然喂食量减少,很可能导致咬鱼.鹦鹉也有可能,蓝鲨一般不会咬鱼.

Benjamin Franklin —— 13-point plan for honest living
These names of virtues, with their precepts, were:
1. TEMPERANCE. Eat not to dullness; drink not to elevation.
2. SILENCE. Speak not but what may benefit others or yourself; avoid trifling conversation.
3. ORDER. Let all your things have their places; let each part of your business have its time.
4. RESOLUTION. Resolve to perform what you ought; perform without fail what you resolve.
5. FRUGALITY. Make no expense but to do good to others or yourself; i.e., waste nothing.
6. INDUSTRY. Lose no time; be always employed in something useful; cut off all unnecessary actions.
7. SINCERITY. Use no hurtful deceit; think innocently and justly, and, if you speak, speak accordingly.
8. JUSTICE. Wrong none by doing injuries, or omitting the benefits that are your duty.
9. MODERATION. Avoid extremes; forbear resenting injuries so much as you think they deserve.
10. CLEANLINESS. Tolerate no uncleanness in body, cloths, or habitation.
11. TRANQUILLITY. Be not disturbed at trifles, or at accidents common or unavoidable.
12. CHASTITY. Rarely use venery but for health or offspring, never to dullness, weakness, or the injury of your own or another's peace or reputation.
13. HUMILITY. Imitate Jesus and Socrates.

得看语境,
如果在一定的语言环境中,如对话,文章中,已经提到了十三条白裤子,即说话对方已经先前说过了,已经是心知肚明了,就应该加the.
如果第一次说道,就不用了.
the在这里的作用就是告诉对方,这十三条白裤子就是上面所说的那十三条,而不是另外的十三条.
明白?

假设一个顶点是A,与A共一条棱的有3个点BCD 切去的那个四面体,如果没有和BCD点重合的点,就是15条棱 如果有1个点重合的点,就是14条棱 如果有2个点重合的点,就是13条棱 如果3个点都重合,就是12条棱 图不太方便画

50颗小星代表了美国的50个州,而13条间纹则象征着美国最早建国时的13块殖民地.红色象征勇气,白色象征真理,蓝色则象征正义.这面旗帜俗称“星条旗”(Stars and Stripes),正式名称“合众国旗”(The Flag of the United S...