The environmental issues are becoming more serious.

Environmental issues are becoming more serious day by day.

We need to diversify our product line.

Our company is promoting the diversification of products.

This process requires standardization to ensure the quality of the product.

We need to standardize this process.

In Japan, the declining birthrate is progressing.

Erhua in Beijing dialect is a characteristic phonetic phenomenon.

He personified nature and called it Mother Earth.

She personifies nature and treats it like a friend.