We have studied out a new plan.
我们拟出了一个新计划。
We have studied here since 2003.
我们自2003年来就在这儿读书了。
We have studied English for years.
我们学英语已有好几年了。
We have studied 600 words this term.
这个学期，我们已经学完了600个单词。
We have studied for 5 hours straight.
我们已经连续学习了5个小时。
We have studied English for six years.
我们学习英语已经6年了。
We have studied English for two years.
我们已经学了两年英语了。
We have studied for one hour (already).
我们学了一个小时了。
We have studied English for three years.
我们学英语已三年了。
We have studied in this school since 2001.
自从2001年以来我们一直在这所学校学习。
We have studied at this school for two years.
我们已经在这个学校学习两年了。
We have studied 20 English lessons this term.
这个学期，我们已经上完了20篇英语课文。
We have studied English for more than 2 years.
我们学英语已有两年多时间了。
We have studied English for more than ten years.
我们学英语已经10多年了。
We have studied the effect of reaction conditions on yield.
考察了反应条件改变对收率的影响。
We have studied the biological clock of human body for a century.
对于人体生物钟的研究已经有一个世纪了。
Up till now, we have studied English for about more than five years.
直到现在为止，我们已经学了大约五年多英语。
In the first two chapters of this thesis, we have studied this subject.
本文前两章讨论研制该类激光器方面的课题。
By conversation we can put into practice what we have studied in grammar.
由于会话，我们可以把我们在文法所读的付诸练习。
We have studied the preparation of acid resisting cement from local waste.
研究了以辉绿岩厂“三废”为主要原料制备抗酸水泥的方法。
And we have studied the numerical solution method of 3d temperature filed.
研究了定子三维温度场的数值求解方法。
With the existing research result, we have studied about it from three angles.
结合前人已有研究成果，从三个不同角度探讨“先生”称谓。
We have studied English for only a year, yet we can act English plays already.
我们才学了一年英语，但已经能演英文剧了。
We have studied the oligomerization of tetrafluoroethylene and its application.
研究了四氟乙烯齐聚反应及其产物的应用。
As we have studied several weeks ago, intermarriage is not a racial or ethnic issue.
我们几个星期前已经学过，与异族女士通婚不是一个种族的问题。
How many idioms have we studied in this book so far?
到现在为止，我们在这本书里学了多少片语呢？
We must conclude from the work of those who have studied the origin of life.
根据那些研究生命起源的人们所作的工作，我们必然得出这样的结论。
We have many good friends who studied and played together.
我们有许多一起学习玩耍的朋友。
We have many good friends who studied and played together.
我们有许多一起学习玩耍的朋友。
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