形容二三岁孩子怎么说英语

To describe a child who is two or three years old in Engpsh, you could say that the child is a "toddler" or a "preschooler." You could also describe the child's age as "two" or "three" years old. Here are some example sentences:

"My son is a toddler. He's just turned two."
"My daughter is a preschooler. She's three years old."
"I have a two-year-old and a four-year-old."

In general, toddlers and preschoolers are at an age where they are learning to walk, talk, and explore their surroundings. They are also often very curious and eager to learn new things.