The libero cannot serve, spike the ball over the net or rotate into the front-line positions, but plays a vital role for the team in serve reception and backcourt defense.

自由人不能发球，当球高于球网时不能扣球，也不能按轮转顺序站到前排去，但他在接对方发球和后排防守方面却起到了至关重要的作用。

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Some will compare historical hotel occupancy and average hotel revenues per room for specific weeks to the event-week in question to gauge the net spike in economic activity.

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For two consecutive quarters, Aetna has seen net income spike up sharply despite a small percentage downdraft in revenues.

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So, if the percent is high, that could be a negative for a given stock, since a dip in revenues, or a spike in expenses (or any other myriad of combinations that lower net income) could make the dividend unsustainable.

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