She noticed a marked difference in the children on her second visit.

她第二次来访时注意到孩子们发生了明显的变化。

《牛津词典》

There is a marked difference between the two.

二者较然不同。

《新英汉大辞典》

On occasion, one plant has a marked difference in size over the other.

有时一个植株可能与其它植株存在明显不同。

youdao

Why is there a such marked difference between the placement of Spanish women and men in their respective lists?

FORBES: Effective Retirement Age vs. Official Retirement Age

Again, there was a marked difference in the level of detail and richness in description from the bilingual pupils.

BBC: Bilingual children 'better at problem-solving skills'

Ceccarelli said studies had shown a marked difference between how racing drivers and normal people responded to the tests.

CNN: F1 drivers' hearts beat 190 times a minute in races