1.
One can not learn a language well unless one works hard.
学好一种语言非下苦功不可。
2.
Because the mastery of language is not easy and requires painstaking effort.
因为语言这东西，不是随便可以学好的，非下苦功不可。
3.
The mastery of language is not easy and requires painstaking effort.
语言这个东西不是随便可以学好的，非下苦功不可。
4.
One must make painstaking efforts before one could succeed in mastering a foreign language.
要掌握一门外语,非下苦功夫不可。
5.
The mastery of a language is not easy and requires painstaking efforts.
语言这东西，不是随便可以学好的，非下苦功夫不可。
6.
The mastery of acupuncture is not easy and requires painstaking effort.
掌握针灸不是件容易的事情,非下苦工夫不可.
7.
You will have to answer for your rush and carelessness.
你这样毛躁非吃苦头不可。
8.
People are not only unlovely; they are helpless.
人非但不可爱，而且也是孤苦无助的。
9.
The President regarded recognition as an unpleasant pill which we should both have to swallow.
总统认为承认问题是一颗两国非吞下去不可的苦药丸，他希望我们应该一起吞下。
10.
Marked by persevering, painstaking effort.
勤奋的是有不屈不挠的、下苦功的特征的
11.
Sure enough, his second letter was very different. He wrote most bitterly, and said Miss Feng's face had swollen. Unfortunately I made no copy of this letter.
果然，第二封信就很不同，措词非常惨苦，且说冯女土的面目都浮肿了，可惜我没有抄下这封信。
12.
There is no easy way to learn English well, you'll just have to work hard at it .
学好英语不是轻而易举的事，谁都得下苦功夫。
13.
Mark these three words, "make", "arduous" and "efforts". We must bestir ourselves and make arduous efforts.
下苦功，三个字，一个叫下，一个叫苦，一个叫功，一定要振作精神，下苦功。
14.
It made me so miserable I wanted to die.
这叫我非常的苦痛，我觉得已经不必活下去了。
15.
A man needs must lie down when he sleeps.
人睡时非躺下来不可。
16.
Hard work leads to success.
苦干可以导致成功。
17.
You must be willing to work hard.
你必须肯于下苦功夫。
18.
Your attempts at sarcasm are not very happy.
你的挖苦是很不成功的。