Not only are mothers not paid but also most of their boring or difficult work is unnoticed.
母亲们不仅得不到报酬，而且所干的乏味艰辛的活儿也很少被留意。
He finished this difficult work by himself.
他自己完成了这项困难的工作。
On farms and in factories, they help to do difficult work.
在农场、工厂里它们帮助完成困难的工作。
那是多么困难的工作啊！
I want her to do the difficult work.
我要她做这件困难的工作。
这也是很困难的事情。
His job is to do the difficult work all day.
他的工作就是整天干那些艰难的活儿。
This is going to be hard and difficult work.
这将是艰苦卓绝的工作。
He always volunteered for the most difficult work.
他总是主动要求做最困难的工作。
Are you willing to finish the difficult work with me?
你愿意和我一起完成这项困难的工作吗？
On farms and in factories, they help to do difficult work.
在农场、工厂，它们帮做困难的工作。
It's impossible to finish the difficult work within two hours.
两个小时之内完成这项艰巨的工作是不可能的。
It's so difficult work that we can't finish it in a short time.
这个工作太难了，我们不能在短时间内完成它。
Thank you for taking great trouble to help us with the difficult work.
感谢不辞辛劳地为我们的工作提供帮助。
Welcome difficult assignments. Progress lies in accomplishing difficult work.
唯有完成艰难的工作才有进步。
How to strengthen the cost control of the construction enterprise is a difficult work.
如何对施工企业加强成本控制是一大难点。
The cleaning of evaporator coil scar is a difficult work of production in the aluminium plant.
铝厂蒸发器管束结疤的清除是其生产中一个难题。
People with this aspect have the ability to perform difficult work and possess great commitment.
有这相位的人，有能力进行困难的工作及作出出色的贡献。
Measuring the big-electric current and the big voltage is a difficult work in engineering measurement.
大电流、大电压的测量一直是困扰工程测量学的难题。
It was long, slow, difficult work, and during the next months I learnt to be very clever with my tools.
这是一项漫长艰难的工作，在随后的几个月里我学得熟练地使用工具了。
This is the main function for module loading, making use of numerous other functions to do the difficult work.
这是加载模块的主要函数，它利用许多其他函数完成困难的工作。
Shaft repair is a very difficult work, especially to the operating shafts. Their repair is even more difficult.
竖井井筒返修处理是一项难度很大的工作，尤其是已投入生产使用的竖井，其返修处理则更加困难。
Finding these planets, known as exoplanets since they are located outside of our solar system, is difficult work.
这些行星叫系外行星，因为它们处于太阳系以外。要找到它们可不容易。
I've just taken a new job. I earn a lot of money but it's difficult work. I'm always afraid of making a mistake.
我刚找了个新工作，可以赚很多钱，但是工作太难了，我总是担心会出错。
The inverse calculation for the phase of optical wave field of Fresnel diffraction is a significant but difficult work.
衍射光场的相位逆运算是有意义并且困难的工作。
I think that once I prove myself to my superiors, I will have the chance to do increasingly difficult work assignments.
我想，只要我能证明自己的能力，我就有机会承担更艰巨的工作。
Bids for the international projects are a complicated and difficult work. The quoted price is the key point of the bids.
国际投标是一项复杂的难度较大的工作，能否中标的关键在于报价。
Bids for the international projects are a complicated and difficult work. The quoted price is the key point of the bids.
国际投标是一项复杂的难度较大的工作，能否中标的关键在于报价。
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