运用二因素五水平回归正交旋转组合设计，进行施氮量与密度对油菜产量影响的研究。
Using quadratic rotational regression combination design to study the influence on yield of the rape under the different nitrogen and density.
采用三因素五水平最优回归设计，研究了黄泥土配施氮钾硫肥对大白菜产量和硝酸盐含量的影响。
An optimum regression design with three factors and five levels was adopted to find the effects of n, K and s fertilizers on the yield of Chinese cabbage and the nitrate content in its plant.
超越狭隘古老大门，路点头稍微往山谷占地迷宫墓穴，那里有数以千计的尸体埋在沿五水平的隧道。
Beyond the narrow ancient gate, the road dips slightly into a valley covering a maze of catacombs where thousands of bodies were buried along five levels of tunnels.
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