Some sufficient conditions for the strict oscillation, the cycle length and the position of the extreme in a semicycle of the equation are obtained.
得到了方程（ ）严格振动的充分条件，环长以及环上极值位置。
Some sufficient conditions for the strict oscillation, the cycle length and the position of the extreme in a semicycle of the equation are obtained.
得到了方程（ ）严格振动的充分条件，环长以及环上极值位置。
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