He was never dull, always erudite and well informed.

他从来都不愚笨，而且一直是那么博学多识。

《柯林斯英汉双解大词典》

Life is never boring for Virgo and Pisces and their discussions are never dull.

处女座和双鱼座的生活永远不会无趣，而他们间的讨论也永远不会乏味。

youdao

His writing is never dull, but nor is it superficial, in a field where both dullness and superficiality are common.

他的写作风格决不呆板枯燥，当然也不流于肤浅，而在写作界枯燥和肤浅是何其泛滥。

youdao

In her explorations of different male subcultures, Ms Faludi is always alert and almost never dull.

ECONOMIST: American men

Doing business in China is never dull, and this is truer today than ever before.

FORBES: China's Cities Take Steps To Stimulate Home Purchases

And it allows manufacturing engineers to focus lasers extremely tightly into blades that never dull.

FORBES: Magazine Article