Although plant growth was affected by the herbicide, no evidence of repression or derepression was observed.

尽管植物的生长受到除草剂的影响，但还未观察到阻遏或解阻遏的证据。

Time course of expression of hydrogenase activity showed that the derepression of hydrogenase activity depended on nickel.

氢酶活性表达的时间进程受镍的调节，氯霉素阻遏氢酶活性。