giddy

她在课堂上嬉闹的行为显得很不成熟。

Her ___giddy antics in class seemed very immature.

想到明天的旅行，她兴奋得有些头晕。

She felt ___giddy thinking about the trip tomorrow.

从旋转木马上下来后，她感到有点头晕。

After getting off the merry-go-round, she felt a bit ___giddy.