The eldest son went in winter, the second in spring, the third in summer, and the youngest son in fall.

二儿子在春天去看；三儿子在夏天去看；小儿子在秋天去看。

youdao

The eldest son went in winter, the second in spring, the third in summer, and the youngest son in fall.

二儿子在春天去看；三儿子在夏天去看；小儿子在秋天去看。

youdao