Well, that depends somewhat on what causes it - if the disturbance came from natural causes or if it was directly caused by people.

这个要取决于出现问题的原因，是自然的原因或是由人类直接导致的。

Some bacterial diseases are not directly caused by a bacterium itself, but by a toxin produced by the bacterium.

有些细菌性疾病不是由细菌本身直接引起的， 而是由细菌产生的毒素引起的。

When someone from the audience asked Burt if he was suggesting that this erratic behavior was directly caused by increased intelligence, Burt ducked the question.

观众席中有人问伯特说，他是否在暗示，这种错乱的行为是智慧提高后所直接导致，伯特避开这个问题。

Those emissions have doubled since 1980, raising average global temperatures by at least 0.7 degrees Celsius, which doesn't sound like much, but at just 2 degrees of warming, 1 in 20 extinctions will be directly caused by climate change.

自 1980 年起气体排放量就已经翻倍了，全球平均气温也上升了至少 0.7℃，这听起来好像不多，但是温度仅仅上升两摄氏度就会直接造成 1/20 的物种灭绝。