用时方恨少

那说明你的词汇量还是很少的,所以要多学习的,要多读些课外读物,关于英语的,其实我自己也是,写短语还行,长篇大论就不行了,我有个朋友之前比我还菜,之后她报了个什么英语培训的,哇塞,就一个月左右吧,词汇量比我多了好几番,她说她在什么叫洛基学的,因为离她上学的地方近,就大学城附近好像

What we need to strive for are: diligently learning knowledge;better at solving problems;actively taking action.We alway say that knowledge is not enough when we put it into practice.Acutually learning is a course of accumulation.Without learning day by day,it's impossible to highly skillful at using whenever need it.However,the knowledge learned in the books in university is far from the real life. Just for many problems the books can not clearly explain clearly, so we need another way to make the transition between the knowledge and practice,that is frequently communicating with the classmates.We should learn when live for without learning,we can't meet the needs of the Times.Consideration is a kind of motivation,that means the application of the learned knowledge, that is how to put the knowledge into practice. Good at thinking means how to think in a direct way,making passivity into initiative.Being a man is the same way as doing things.If you always correctly think about the problem, most of which can be easily solved,and many good ideas would be come out naturally. Sometimes we feel great pressure from the daily life, struggling to cope with, but we should see the break point of knowing how to think and find the stressor.This is a problem about thinking, that is the place that your feet can not reach, your sight can get it;the place that you sight can not reach, your thought can get it . Studying diligently,better at solving problems,boldly engaging in practice,from doing everything by your side,that is we shall put all the learning and thought into practice.

书到用时方恨少,事非经过不知难.
有人说是陆游写的,但都没有注明出处
【鉴赏】这是一副劝勉联,对联虽浅显易懂,却蕴含着深刻的哲理.如果说上联是劝勉人们要“贵学”,那么下联“事非经过不知难”,就是强调“行”的重要性,光“学”不“行”终是无益.

书到用时方恨少
字面意思等到真正用到知识的时候才后悔自己会的知识太少了。
最后启示我们平时应当勤学好问，等到真正用到知识的时候，才不会手忙脚乱地去翻书。
源自于《警世贤文》之勤奋篇：
有田不耕仓禀虚 有书不读子孙愚
宝剑锋从磨砺出梅花香自苦寒来
少壮不经勤学苦 老来方悔读书迟
书到用时方恨少事因经过始知难
板凳要坐十年冷文章不写一句空
智慧源于勤奋 伟大出自平凡
书山有路勤为径 学海无涯苦作舟
少年不努力老大徒伤悲
欲求生富贵 须下死功夫

" 我今天生日,求祝福啦·"
" Today is my birthday,and I am asking you for your blessings."
"ask somebody for something" 向某人寻求某物.
【公益慈善翻译团】真诚为你解答!

“书到用时方恨少,事非经过不知难”
这是一副劝勉联，对联虽浅显易懂，却蕴含着深刻的哲理。如果说上联是劝勉人们要“贵学”，那么下联“事非经过不知难”，就是强调“行”的重要性，光“学”不“行”终是无益。陆游在《冬夜读书示子聿》中云：“纸上得来终觉浅，绝知此事要躬行”，明林鸿说：“一语不能践，万卷徒空虚”，也是此理。宋代的朱熹和清代的王夫之更把“知”“行”关系说得明白。朱熹说：“论先后，知为先；...

开2,后面3,4,5选2,用公式算C（3,2）=3x2/(2x1)=3种,分别为234,235,245
开1,后面2,3,4,5选2,用公式C（4,2）=4x3/(2x1)=6种
总共有C（5,3）=5x4x3/(3x2x1)=10种
每一种都是等概率事件
开2的概率为3/10=0.3
开1的概率为6/10=0.6