她才

She is only … (so young / at such a low level)., she really is; she definitely does not (emphatic or corrective, depending on what follows)

→ 她
phrase Uncommon #9,317
She is only … (so young / at such a low level). 才 emphasizes that her age or grade is lower than expected or relevant to the conversation.
CH: 她才六岁。
EN: She’s only six.

她才五岁好不好

She’s only five years old, okay?

— 小萝莉的猴神大叔 (2015)

你说她才四岁,你骗我

You told me she was only four years old. You lied to me.

— 猫鼠游戏 (2002)

她才六岁

She’s only six years old.

— 小萝莉的猴神大叔 (2015)

她才十九岁

She's only nineteen years old.

— 神秘河 (2003)

她才小学二年级

She's only in the second grade of elementary school.

— 孤胆特工 (2010)

phrase Rare #31,804
she really is; she definitely does not (emphatic or corrective, depending on what follows) Used to strongly assert or contradict something about her. The exact English wording depends on the predicate that follows.
CH: 她才是贼!
EN: She’s the one who’s the thief!

她才没生病,

She’s definitely not sick.

— 青春年少 (1998)

她才不在乎什么诗歌呢

She doesn't care about poetry at all.

— 触不可及 (2011)

她才是贼!

She’s the real thief!

— 再见,孩子们 (1987)

她才不要你的破刀。

She doesn't want your crappy knife.

— 甘泉玛侬 (1986)