I shall leave the place probably in the course of a twelve-month; but while I do stay, I will exert myself to the utmost for its improvement.
我很可能在一年之内离开这个地方，但我还在时，我要竭尽全力使它有所改进。
I've got to exert myself more for I don't want to make a bungle of this book.
我必须更加努力，因为我可不想把这本书写砸。
Though it is difficult to learn these things, I will exert myself(try my best/ try hard /take great efforts) to do it well.
我知道学习这些都挺难的，但是我会努力去学的。
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