危险化学品被意外泄漏进了河里。

Dangerous chemicals were accidentally ___released into the river.

这家工厂向大气中排放有害气体。

The factory ___releases harmful gases into the atmosphere.

在加压过程中，蒸汽意外地通过一个阀门释放了。

During the pressurization process, steam was accidentally ___released through a valve.