adj.体重不足的，未达到正常体重的
n.重量不足(的)

The doctor expressed concern that the baby was significantly underweight for her age.
医生对婴儿的体重远低于其年龄段的正常值表示担忧。
Despite eating regularly, Jane remained persistently underweight, which worried her parents.
尽管简定期进食，但她体重一直过轻，这让她的父母很担忧。
Many athletes, especially those in endurance sports, may appear underweight due to their low body fat percentage.
许多运动员，特别是耐力项目的运动员，由于体脂率低，可能看起来体重偏轻。
The malnourished kitten was severely underweight, with its bones clearly visible beneath its fur.
这只营养不良的小猫体重严重不足，皮下的骨头清晰可见。
After battling an eating disorder for years, Sarah finally achieved a healthy weight, having previously been severely underweight.
在与饮食失调症斗争多年后，萨拉终于恢复了健康体重，此前她的体重严重不足。
The veterinarian recommended a high-calorie diet for the underweight rescued dog to help it regain its strength.
兽医建议给这只体重偏轻的被救犬喂食高热量食物，以帮助它恢复体力。
Researchers found that individuals who were underweight during childhood had a higher risk of developing osteoporosis later in life.
研究人员发现，童年时期体重偏轻的人在晚年患骨质疏松症的风险较高。
Due to the stress of the move, the elderly cat began losing weight and became underweight, prompting a visit to the vet.
由于搬家的压力，这只老年猫开始体重下降，变得体重不足，因此被带去看兽医。
The fashion industry has been criticized for promoting unrealistic body standards, often featuring models who are underweight.
时尚界因推崇不切实际的身材标准而受到批评，经常选用体重偏轻的模特。
In some cultures, being underweight is considered desirable, leading to harmful practices such as extreme dieting and purging.
在某些文化中，体重偏轻被视为理想状态，导致了诸如极端节食和催吐等有害行为的发生。