They feel shy about showing their feelings.

他们不愿表达自己的感情。

《柯林斯英汉双解大词典》

The electric-power industry is gun-shy about building more large plants.

电力行业对建设更多的大型电厂十分担心。

《柯林斯英汉双解大词典》

Webster wasn't shy about expressing his opinions.

韦伯斯特从不羞于表达自己的观点。

youdao

Roger Smith,a co-founder of the International Association of Genocide Scholars, says many Turks refuse to use the word 'genocide.' "I worked with some Turkish scholars and these are people who would be considered liberals and so on - but even they really kind of shy away from using the word 'genocide.' They will talk about massacres - you lay all of these things out and they say yeah,yeah,yeah, this happened,okay - well no,I don't want to use that word.

VOA: standard.2010.03.19

People aren't shy about kicking off their shoes and tucking into display beds for a nap.

WSJ: In China, IKEA Is a Swede Place for Senior Romance, Relaxation

Athletes, Weyand notes, have never been shy about using medical advances to improve their performance.

FORBES: What's The Human Speed Limit?

My advice is to not be shy about promoting your own talents and contributions.

FORBES: Self-Promotion + Sponsorship = Career Success