她真是小孩子气,太冒失了。
She's just being childish and immature.
《柯林斯英汉双解大词典》
但是自己一点都还不成熟,还是那么小孩子气。
But his point is not yet mature, or so small childish.
youdao
应用推荐
模块上移
模块下移
不移动