smile vi. 不介物动词 ,后面跟介词 at 组成动词短语 smile at :通常 at 后面跟名词、代词 作介词宾语 。如:
smile at sb. 对......笑 ,(不是补偿其人)
Look ! The lovely baby is smiling at us.
瞧,那个可爱的baby 在对我们笑呢 。
而 smile on one’s face ,这个smile n.
是名词。如:
The children look into their presents
with a big smile on their face .
孩子们面带着微笑看着他们的礼物 。
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