We must plough on somehow in spite of all the difficulties.
尽管困难重重，我们仍需坚持下去。
You can start again on mathematics, until is it is time to learn to plough.
你可以重新开始学习数学，直到该学犁地的时候。
Mr. Roberts has been working on a design for a lighter plough.
罗伯斯先生一直在设计一种比较轻的犁。
The random forces on the mole plough were studied by the spectral analysis method.
采用频谱分析方法研究了鼠道犁土壤工作部件的随机受力。
The random forces on the mole plough were studied by the spectral analysis method.
采用频谱分析方法研究了鼠道犁土壤工作部件的随机受力。
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