"I am not going to be," and he frowned again with determination.

“我不会变成怪人的。”他又皱起了眉头，下定了决心。

youdao

He frowned with mock severity.

他沉下脸来，装出一副严厉的样子。

《牛津词典》

He frowned at her anxiously.

他焦急地朝她皱了皱眉。

《柯林斯英汉双解大词典》

He never smiled,he never frowned, But all through the endless story there was a feeling of great seriousness and honesty.

VOA: special.2009.08.29

Aliou Sow,12,frowned and said he wished farmers understood the damage many are doing.

VOA: standard.2010.04.01

He knocked again, and when she turned he frowned and shooed her once more.

NEWYORKER: Brooklyn Circle

When he saw me watching him, he grinned suddenly, then frowned and jerked his head away.

NEWYORKER: Miracle Polish

"It's kind of frowned on, " he told the magazine.

CNN: Ex-Navy sniper killed at Texas gun range