1. Lightning is caused by clouds discharging electricity. 闪电是由云层放电产生的。
2. The factory was fined for discharging chemicals into the river. 这家工厂因往河里排放化学物质而被罚款。
3. Such actions as discharging waste water to rivers not only pollute the environment but also become a danger to people's health. 像排放污水这样的行为不仅污染了环境,还成为了人民健康的威胁。
4. The river is diverted through the power station before discharging into the sea. 这条河改道经水电站后流入大海。