"I have two children, a boy and a girl" 这句话在英语中表达为 "I have two children, one is a boy and the other is a girl"。

来源：这是一句常见的英语表达方式，用于表示一个人有两个孩子，其中一个是男孩，另一个是女孩。

例句：

"I have two children, a boy and a girl. Their names are Michael and Sarah."（我有两个孩子，一个是男孩，一个是女孩。他们的名字叫迈克尔和莎拉。）
"My husband and I have two children, a boy and a girl. They are six and eight years old." （我和我丈夫有两个孩子，一个是男孩，一个是女孩。他们分别六岁和八岁。）
"I have two children, a boy and a girl. They are both in school now."（我有两个孩子，一个是男孩，一个是女孩。他们现在都在上学。）