old faithful

• 指美国黄石国家公园著名的间歇泉“老忠实泉”，以其规律且可预测的喷发而闻名。也引申指始终可靠、忠贞不渝的人或事物。

A proper noun referring to a famous geyser in Yellowstone National Park, USA, known for its regular and predictable eruptions. It is also used figuratively to describe something or someone that is reliably consistent and dependable.

1. Reliable person or thingB2informal

   A person or thing that is consistently dependable, trustworthy, and always performs as expected.

   可靠的人或事物

   • My old faithful car has never broken down on a long trip.
   • He is the old faithful of the team, always showing up and doing his job.
   • This recipe is an old faithful; it never fails to impress guests.

2. Geyser in YellowstoneB1formalamerican

   A famous, highly predictable cone geyser located in Yellowstone National Park, Wyoming, USA.

   老忠实间歇泉

   • Old Faithful erupts approximately every 90 minutes.
   • Tourists gather to watch Old Faithful shoot water high into the air.
   • The park ranger gave a talk about the geology of Old Faithful.