Please avoid colloquial expressions in client emails and keep the tone professional.

寫給客戶的電子郵件請避免使用口語化的說法，並保持專業語氣。

The training manual was rewritten in a more colloquial style so new hires could follow it.

訓練手冊改寫成較口語化的風格，讓新進員工更容易理解。

Our tour guide spoke colloquial English, which made the city walk feel relaxed and friendly.

我們的導遊說的是口語化的英文，讓這趟城市導覽感覺輕鬆又親切。