到夏天结束时，他意识到自己追求近三年的数学方法是有缺陷的。
By the end of the summer, he realized the mathematical approach he had been pursuing for almost three years was flawed.
自上初中以来，老师们和我们在一起将近三年了。
Our teachers have been with us for nearly three years since we came to junior high school.
他穿过了一些大沙漠。这段旅程花了将近三年的时间。
He crossed some large deserts. The journey took almost three years.
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