Isoquant curve is a line showing all the alternative combinations of two factors that can produce a given level of output.

等产量线是表示两种生产要素的不同数量组合可以带来相等产量的一条曲线。

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The last commented line shows the alternative group member attribute mapping.

最后的注释行显示了替代的组成员属性映射。

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Optional features are requirements that are present in some members of the product line, and alternative features are requirements that some members of the product line choose from.

可选功能是产品线的部分成员中存在的需求，替代功能是产品线的部分成员从中进行选择的需求。

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For these and other conditions, he says, nicotine and its relatives offer an alternative line of attack to that used by existing drugs.

ECONOMIST: Great drug, shame about the delivery system

North Korea has suggested an alternative line, but South Korea has resisted, as it would bring the North's maritime boundary close to Incheon, a main port.

CNN: STORY HIGHLIGHTS

U.S. officials negotiated use of the routes, known as the Northern Distribution Network, as an alternative inbound supply line for Afghanistan amid worsening relations with Pakistan and attacks on coalition supply convoys.

WSJ: U.S. Sets Stage for Exodus from Afghanistan