He just doesn't wear his heart on his sleeve.

只是他不是一个感情外露的人。

youdao

No, son. He loves you. He just doesn't wear his heart on his sleeve.

儿子，他爱你。只是他不是一个感情外露的人。

youdao

Admittedly, Conrad was difficult to know - "always calculatingly guarded", Mr Stape says, "even when appearing to wear his heart on his sleeve."

确实，康拉德很难了解——“即使当他的情感完全表露出来，他仍然在算计着保持戒心。”Stape说。

youdao

"I would suspect that it's because of his position as a sort of an avuncular authority figure, your old Uncle Ted, who's sort of a gruff guy who cares about you, but he doesn't wear his heart on his sleeve about it, " Mitchell said.

NPR: 'Uncle Ted' Stevens: Alaska's Gruff, Tough Advocate