GbEng
青年人通常比老年人精力充沛些。 Young people usually have more energy than the old.
在各条战线上都有精力充沛朝气蓬勃的青年人。 On every front there are young people abounding in vigor and vitality.
朝气蓬勃的具有或拥有青年人特点的，如活力、朝气或热情，与青年人有关 Marked by or possessing characteristics, such as vigor, freshness, or enthusiasm, that are associated with youth.
别取笑青年人的装模作样；他们只不过是为了找寻自我而逐一试装出各种面孔罢了。 Do not laugh at a youth for his affectations; he is only trying on one face after another to find his own.
根据法律规定青年人年满十八岁必须参军。 "According to the law, a young man should enlist when he is18."