How can the district help clubs become or remain effective?

地区如何能协助扶轮社变得或保持有效成功？

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This offer will remain effective for another 10 days from June 1.

该报盘从6月1日起10天内有效。

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To remain effective, it must respond to contemporary circumstance.

为了保持有效，它必须响应时代环境。

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To remain effective the enemy "must expose himself more and take higher risks to do his ugly work, " Meigs said.

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For the sulphate-injection method to remain effective they would need to be replenished constantly for centuries longer than the lifetime of most countries.

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The NCI hopes to enroll 390 patients for the next phase of these trials, but they caution it will be six to eight years before they can prove this vaccine can remain effective.

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