x y v but actually the relevant variables for your problem are u and v.
只是让f的式子变得漂亮点，，So，x，and，y，are，giving，you，a，nice，formula，for，f，实际上，与问题有关的变量是u、
Now, we need to figure out, so, we started u equals v.
现在，我们需要指出，从u=v开始。
Wanna get some U. V. s before we go home.
回家前我想晒会儿太阳。
Coupling Series, U-joint Series, C. V. Joint, Construction Machinery Transmission Shaft Series.
汽车十字万向节，三叉万向节联轴器，差速器，传动轴。
Excellent durability and wear resistance with the special U. V. coating.
采用特殊u.v。处理，具有出色的耐磨性和抗冲击性，经久耐用。
Easy cleaning with the special U. V. coating.
采用特殊u.v。处理技术，极佳耐污染、容易清洁。
Easy cleaning with the special U. V. coating.
采用特殊u.v。处理技术，极佳耐污染、容易清洁。
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