underweight
adj
below the usual, legal or stated weight 低於一般重量的; 未达标准或规定之重量的; 重量不足的
You are only slightly underweight for (ie in relation to) your height. 按你的身高来说, 你体重仅稍轻一点儿.
The coal is six pounds underweight/underweight by six pounds. 这些煤的重量少了六磅. =>Usage at thin 用法见thin. Cf 参看 overweight.
🗣️ 情景例句
Sure, but never before have we had payment in RMB.
当然可以,不过我们从来没有用过人民币付款。
Attitudes towards drinking and smoking in the U.S. are, in some ways, very different from those in Asia.