underweight
adj
below the usual, legal or stated weight 低於一般重量的; 未達(dá)標(biāo)準(zhǔn)或規(guī)定之重量的; 重量不足的
You are only slightly underweight for (ie in relation to) your height. 按你的身高來(lái)說(shuō), 你體重僅稍輕一點(diǎn)兒.
The coal is six pounds underweight/underweight by six pounds. 這些煤的重量少了六磅. =>Usage at thin 用法見(jiàn)thin. Cf 參看 overweight.