Her youngest son is very smart.

她的小儿子非常聪明。

The youngest son likes to draw.

小儿子喜欢画画。

The youngest son always makes us laugh.

小儿子总是让我们笑。

The youngest son loves to eat ice cream.

小儿子最喜欢吃冰淇淋。

His youngest son was diagnosed with autism.

他的小儿子被诊断出患有自闭症。

Our youngest son just learned to ride a bike.

我们的小儿子刚刚学会骑自行车。

I was the youngest son， and the youngest but two.

我是最小的儿子，但我还有两个妹妹。

He dotes on his youngest son.

他溺爱小儿子。

She coddled her youngest son madly.

她对小儿子过于溺爱。

His youngest son was the rotten apple.

他最小的儿子是个败类.