But they acknowledge that figuring out how their policies affect that index will be a challenge.

(假设有其他的城市效仿他们的例子)但他们知道，算出他们的政策能够影响幸福指数多少，这是个挑战。

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Introduced the invasion examination system classification. Described the invasion examination system performance index. Has discussed the challenge which the invasion examination system faces.

介绍了入侵检测系统的分类，描述了入侵检测系统的性能指标，探讨了入侵检测系统面临的挑战。

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In technical side, short-term technical indicators support continuous rise in tomorrow index, which will challenge the high of 3004 points.

技术面，短期技术指标支持明日股指继续上行，将挑战前期3004点的高点。

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More recently, exchange traded funds have emerged to challenge index funds with some advantages, particularly in cost.

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"I don't believe in quasi-shadowing any index, " proclaims Jehangir who prefers the challenge of active management.

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The challenge for the architect of a bond ETF is to ensure that it closely tracks its respective index in a cost-effective manner, despite the lack of liquidity in the bond market.

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