Young and old to learn hard, time is not an inch of light.
少年易学老难成，一寸光阴不可轻。
Students should make better use of the four years to learn hard in university.
学生应该充分利用大学四年时间努力学习。
I realized that I know too little things and have little experience in life. So from now on, I will learn hard and enlarge my mind.
我开始意识到自己知道的东西太少，生活经验也少的可怜。所以，从现在开始我要不断的学习、充实自己。
My wish is to do my duty best, to learn hard, to be a honest and brave child.
我的愿望就是尽我的职责，好好学习，做诚实，勇敢的孩子。
Learn, to learn, to learn; hard, hard, try again.
学习，学习，再学习；努力，努力，再努力。
In the river of truth seeking, only to learn, continue to learn, hard to learn, learn creatively to the mountain across the mountains. — Hua Luogeng.
在寻求真理的长河中，唯有学习，不断地学习，勤奋地学习，有创造性地学习，才能越重山跨峻岭。——华罗庚。
Admittedly, the possible combinations are powerful, but they are very hard to learn, hard to remember, and hard to use.
必须承认，这些可能的组合非常有用，但是它们难学、难记又难用。
Admittedly, the possible combinations are powerful, but they are very hard to learn, hard to remember, and hard to use.
必须承认，这些可能的组合非常有用，但是它们难学、难记又难用。
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