Tom is a little boy, and he is only seven years old.

汤姆是个小孩，他才7岁。

youdao

She is only seven years old, but she is tall. she has two big eyes and a small nose.

她只有七岁，但是她长得很高。她有二个大的眼睛和一个小的鼻子。

youdao

I was only seven years old when World war II ended, but I remember hearing the drone of hundreds of planes flying over the Netherlands toward Germany during the war's final days.

第二次世界大战结束时，我只有七岁，但我至今还记得大战结束前数天，听见数百架飞机轰隆不息地在荷兰的上空飞行，前往德国。

youdao

She began to write her own stories when she was only seven years old.

VOA: special.2010.06.06

Barack Obama was only seven years old when Neil Armstrong became the first man to set foot on the moon.

VOA: standard.2009.07.20

From that time until she was almost seven years old, Helen could communicate only by making signs with her hands.

VOA: special.2009.11.08

For another, Masato is only seven years old and doesn't know how to tie his own loincloth.

CNN: Wrestle Mania

Ms. AL SHAY: (Through Translator) She's still only seven years old, but like me, she loves gold.

NPR: Being Rich, and Careful, in Liberated Iraq

Mabunda was first exposed to weapons through his uncle, a soldier in the ruling party's military wing, when he was only seven years old.

CNN: Artist creates objects of beauty from instruments of death