That is the biggest drawback to solar energy, the problem of what do you do in cases where the sun's light is weak or virtually non-present.

这是太阳能的最大缺陷——当太阳光变弱或者不存在时，人们该怎么解决。

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IDS has replaced its checkpoint algorithm with a virtually non-blocking checkpoint algorithm.

IDS已经用一个非阻塞检查点算法替代了它的检查点算法。

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In areas where health systems are weak or virtually non-existent, basic data will not be collected.

在卫生系统薄弱或事实上不存在的地区，是不会收集基本数据的。

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The public transportation is virtually non-existence. And you should never rely on it.

公共交通形同虚设，你不能依赖它。

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Slatin likes ACC as an all-around solid performer with a portfolio of virtually non-cyclical properties.

FORBES: Magazine Article

Disposable personal income growth remains limited, but on an inflation-adjusted basis has been virtually non-existent.

FORBES: Consumer Confidence Up: Solid Jobs Growth Or Crashing Expectations Ahead

Everton's attacking efforts had been virtually non-existent, but they were back in business with almost the last kick of the opening half.

BBC: Everton 2-3 Blackburn