underweight
adj. 重量不足的
n. 重量不足；不符合要求的重量
例句
Women who smoke risk giving birth to underweight babies.
抽烟的妇女生出的婴孩可能会体重不足。
《牛津词典》
Nearly a third of the children were severely underweight.
约有三分之一的孩子曾严重体重过轻。
《柯林斯英汉双解大词典》
We took an underweight position in Ecuadorian bonds.
我们减持了厄瓜多尔债券。
