1. Some animals are inactive during the daytime. 有些动物白天不活动。
2. In the unfertilized egg, the substances are inactive and are not distributed homogeneously. 在未受精卵中，这些物质是不活跃的，而且分布不均匀。
3. A third group are known as crepuscular: they thrive in the low light of dawn and dusk and remain inactive at other hours. 第三组被称为黄昏组：他们在黎明和黄昏的微光中茁壮成长，而在其他时间则不活跃。
4. He certainly was not politically inactive. 他在政治上当然不是无所作为。
5. The volcano has been inactive for 50 years. 这座火山处于休眠状态50年了。
