Objectives the aim of this study is to exam the change of the bone mineral density in pregnancy and lactation using ultrasound technology.

目的超声定量监测妊娠期及哺乳期妇女跟骨骨密度，研究妊娠及哺乳期妇女骨密度的变化规律，探讨超声监测的意义。

youdao

Teaching goal is to aim and task of teaching a specific embodiment of the teaching content is a vehicle to achieve teaching objectives.

教学目标是教学目的和教学任务的具体体现，教学内容是实现教学目标的载体。

youdao

The exhibit's introduction cites the government's definition of terrorism -- "the unlawful use of force or violence against persons or property to intimidate or coerce a government, the civilian population or any segment thereof, in furtherance of political or social objectives" -- and says its aim is to address how and when Americans felt under threat, and from whom.

CNN: Terrorism nothing new to America