"调皮聪明的弟弟" 在英文中可以翻译为 "mischievous and smart younger brother".
"调皮" 在英文中可以翻译为 "mischievous", 它有点调皮捣蛋的意思。
"聪明" 在英文中可以翻译为 "smart", 它指有智慧、聪明的意思。
"弟弟" 在英文中可以翻译为 "younger brother", 它指比自己小的弟弟。
例句：
My mischievous and smart younger brother always gets into trouble because he loves to play practical jokes. (我调皮聪明的弟弟总是惹麻烦，因为他喜欢开玩笑。)
Despite his mischievous ways, my younger brother is actually very intelpgent and always excels in school. (尽管有点调皮，我的弟弟实际上非常聪明，在学校总是表现优秀。)
My younger brother may be mischievous, but he always has a clever solution to every problem. (我的弟弟虽然调皮，但他总是能想出聪明的解决方法。)
"调皮" 在英文中可以翻译为 "mischievous", 它有点调皮捣蛋的意思。
"聪明" 在英文中可以翻译为 "smart", 它指有智慧、聪明的意思。
"弟弟" 在英文中可以翻译为 "younger brother", 它指比自己小的弟弟。
例句：
My mischievous and smart younger brother always gets into trouble because he loves to play practical jokes. (我调皮聪明的弟弟总是惹麻烦，因为他喜欢开玩笑。)
Despite his mischievous ways, my younger brother is actually very intelpgent and always excels in school. (尽管有点调皮，我的弟弟实际上非常聪明，在学校总是表现优秀。)
My younger brother may be mischievous, but he always has a clever solution to every problem. (我的弟弟虽然调皮，但他总是能想出聪明的解决方法。)