Soon, another developmental milestone will be hit, and children begin to communicate in sentences.

很快地，下一波具指标性的后浪就会打上来了，小孩子开始进展到用句子来沟通。

This understanding, of " object permanence" , is a normal developmental milestone, as well as a basic tenet of reality.

这种对“物体恒存性”的理解是正常发展的里程碑，也是现实的基本原则。

Fortunately, dogs and humans both hit very similar developmental milestones.

幸运的是，狗和人类都达到了非常相似的发展里程碑。

The end result is severe and permanent impairment in brain function and a delay in the developmental milestones like sitting and babbling.

最终导致大脑功能的严重和永久性的损伤，以及发育过程里程碑的延迟，比如坐立和咿呀学语。

Some experts even consider lying a developmental milestone, like crawling and walking, because it requires sophisticated planning, attention and the ability to see a situation from someone else's perspective to manipulate them.

一些专家甚至认为，和学会爬行和走路一样，撒谎是成长的里程碑，因为它需要周密的计划和高度的注意力，还要具备从他人的角度观察局势，以及操纵他人的能力。