smile做动词： smile at和smile to都可以用。 smile at表示一笑置之、对/冲某人微笑； smile to表示对…（可抽象，可具体）…微笑。 两者在表示具体事物时可以混用，表示抽象事物只能用to。 …

The focus of the study is the development of anticipatory smiles in which infants smile at an object and then gaze at a social partner while smiling (see Figure 1). In the period between 8 and 12 …

We designed a longitudinal study to examine the changing role of infant positive affect when initiating joint attention at 8, 10, and 12 months of age. The focus of the study is the …

2015年11月10日 · Though in many situations you may find the two used interchangeably, simply because a smile caused by something is usually also directed at it. But to smile to something …

2017年9月27日 · smile at是可以替换smile to的，因为你因为什么笑了，你通常也会“对着”它笑。 但是总得来说smile at更常用，也被更多的认为是正确的答案。 关于介词的使用有一些基本的 …

2017年8月9日 · at表示目标，to表示方向。 例如：He threw the book to me. 他把书扔给了我。 He threw the book at me. 他用书砸我。 He shouted to me. 他大声对我说。 He shouted 因此smile …

Infants smiles at an object and then gaze at an adult while continuing to smile- rises sharply between 8-10 months and seems to be among the first types of communication in which the …

By 12 to 15 months, infants will intentionally smile at an object and then gaze at the adult's face. This behavior is called

smile to较少用，除微笑外，还有赞许的意思。 1、The girl flashed a dazzling smile at the television crew and cameras bearing down on her. 这个女孩对着向她围拢的电视台工作人员和 …

2013年6月8日 · Be aware that babies at this age will also smile at inanimate objects such as ceiling fans, and this is normal for young babies to do. By 2 months of age, babies not only …