the e only child仅有的一个孩子
the only child awake唯一醒着的孩子
is the only child是独生子女;是唯一的孩子
As The Only Child作为惟一儿童
the only child allowance独生子女费
the only child students独生子女学生
the only-child generation独生子女一代;生的独生代;独生代
the policy of only child独生子女生育政策
are you the only child你是独生子女吗
Objective To investigate the prevalence and contributing factors of oral habits on the only child in order to provide a scientific basis for carrying out oral hygiene education and preventing malocclusion.
目的：根据我国存在特有的独生子女现象，研究独生子女人群口腔不良习惯的发生状况、分布特点及相关影响因素，为错(牙合)畸形的预防提供指导依据。
参考来源 - 独生子女人群口腔不良习惯的调查研究So it has become an urgent issue for our armies how to manage and educate the only child to be one with well-being psychological health.
如何对独生子女兵进行科学有效的管理教育,使独生子女兵具有良好的心理健康水平,既关系到个体的发展和完善,也关系到我军战斗力的生成和提高。
参考来源 - 军队独生子女兵心理问题研究