“no spitting”可以造什么句，no spitting造句

The eruption seems to have started with the volcano spitting out lumps of rock up to 2 metres across, before releasing an enormous pyroclastic flow - a fast-moving gush of hot gas and rock.

We will start from around things, starts from me, no spitting, no littering, no discharge sewage, and so on, only the environment good, can we have a good living environment, can truly enjoy life.