现今有许多新的，更强的化学物质，空气和水源的污染，辐射和核电厂等。

There are many new and stronger chemicals, air and water pollution, radiation and nuclear power.

youdao

现今有许多新的，更强的化学物质，空气和水源的污染，辐射和核电厂等。

There are many new and stronger chemicals, air and water pollution, radiation and nuclear power.

youdao